Tag Archives: technology

Recap: NCSM 2017

NCSM logo 2017
San Antonio, CA , April 2017

I have summarized each session with some simple (•) bulleted notes, red underline quotes to encapsulate my major take-aways, and occasionally a brief italicized commentary.


Knocking Down Barriers with Technology — Eli Lubroff (Desmos)

  • The Big Take Away =  Differentiation should not mean different tasks for different students, but instead should offer different depths with same task.
  • Technology can be used effectively to address Inequality, Disabilities and Differentiation.
  • Marbleslides is an example of a high cognitive demand task that naturally differentiates.

  • Our (math ed community) work of offering High Quality, Meaningful, and Relevant mathematics for ALL has never been more important. Non-routine Cognitive jobs are becoming a growing percentage of employment opportunities.

  • Inequality:
    1) 51% of American students are on free and reduced lunch, which equates to 25 million kids!
    2) The two great equalizers: Mass Adoption of Technology and Public Education.
  • Disabilities: For students with disabilities, technology opens doors that have always been closed. Desmos is currently working with a blind person to develop an audio feature that converts graphs to music and sound.
  1. OK, OK already … I’ll finally start using Marbleslides!
  2. I will also place more “extensions/challenge” problems on tasks to offer deeper differentiation.

Gut Instincts: Developing ALL Students’ Mathematical Intuition — Tracy Zager (Stenhouse Publishers)

  • The Big Take Away: In mathematics, intuition is as important as logic, and like logic, needs be explicitly developed.
  • “Intuitive experiences must be acquired by the student through his/her own activities – they cannot be learned through verbal instruction.” —  Erich Wittmann
  • Following mathematical intuition needs to precede the logic. Logic then further encourages the intuition:

  • Tracy had us practice this explicit development of intuition with a simple challenge and manipulative. “Can you try and discover the size of some of these other angles?” We were given the fact that the squares had 4 right angles, but no protractor. Go!”

  • Intuition can also be developed through estimates before the algorithmic practice occurs.


Feeding the Brains’s (Affective and Cognitive) Subcommittees for Mathematics Learning   — David Dockterman (Harvard University)

The Big Take Away = The Brain Has 3 Learning Networks: The WHAT, the HOW and the WHY.” 

  1. The WHAT Network  = Different parts of the brain …
  • Approximate Number System
    All animals can picture quantity especially when comparing a lot vs a few. It gets harder as the ratio approaches 1:1
  • Language Retrieval
    Association between number and name (assigning “eight” to a collection of eight items). Math facts are retrieved in the language that they were learned.
  • Symbol Procedure
    Association between number and symbol (assigning “8” to a collection of eight items).
  • Feeding the WHAT Networka) Connect the Visual, Symbolic & Linguistic parts of the brain through multiple representations
    b) Make Sense through Coherence: What is learned today should be related to what was learned yesterday.

2. The HOW network = Executive Function

  • Cognitive Flexibility
  • Working Memory
  • Concentration
  • Emotional Control
  • Feeding the HOW Networka) Incentives for inputs not output
    b) Develop the Math Practices, focus on process, not results.
    c) Notice: Define the desired learning behaviors and call them out during lesson. This video of the “Monkey Business Illusion” demonstrate how the human mind focuses intensely on what you want it to notice. What behaviors do you want students to focus on?
    d) Nudge: Use Norms to encourage target behaviors. Compare past, less productive behaviors to current successful behaviors.

3. The WHY Network = The Affective State

  • The 3 Mindsets of Why
    -Purpose & Relevance
    – Growth
    – Belonging
  • Feeding the WHY Network
    a) Purpose & Relevance: It is more powerful connecting a cause (Self-Transcendance) than to a career, knowing math will help you make a difference in the world.
    b) Growth: Give feedback like you are giving advice (vs judgement). Carole Dweck, “The brain is like a muscle. The harder it works, the stronger it gets.” This should be the norm. We have to believe in our students abilities before they will believe in themselves.
    c) Belonging: Establish a culture where it is safe to learn (vs perform). We cheer each other’s growth.

Feeding the Entire Network Intentionally

  • Manage teacher cognitive load – don’t look for everything all the time.
  • Match the tasks to illuminating the beliefs, behaviors or knowledge and skills that you want to notice.
  • Behaviors aren’t one-and-done; they need constant nurturing of the mindsets that drive them.
  • Have the right food ready — anticipate, notice and respond.
  • YOU and the adults have to believe.

In regards to praising inputs, not outputs. Dr. Dockterman shared a study on financial incentives. Monetary rewards for better grades showed no improvement; monetary rewards for the behaviors that leads to better grades (notes, homework, questions) showed significant improvement.


What Every Math Leader Needs to Know and Be Able to Model to Support the Classroom Development of Numerical Fluency —  Patsy Kanter & Steve Leinwand (AIR)

  • The Big Take Away = Developing numerical fluency requires planning and active engagement. “

5 Steps to Implementing Numerical Fluency

  1. Commitment: Fluency is more than speed. It takes ongoing, protected time and assessments to develop.
  2. 10 Pivotal Understandings of Numerical Fluency:
    1. All quantities are comprised of parts and wholes that can be put together and taken apart.
    2. Numbers can be decomposed.
    3. Storytelling is key, because vocabulary of the four operations is critcial.
    4. Properties of Operations reduces memory load (like 29 x 25).
    5. Requires discussion of alternate strategies.
    6. 5 & 10 are cornerstones.
    7. Understanding that 9 and (10-1) are the same quantity.
    8. Groups or 2, 3, 5, & 10 are cornerstones of Multiplying.
    9. Ideas of equality and equivalency are key.
    10. Place value dominates fluency of large numbers.
  3. Cement Number Fluency:
    a) Concrete Representations
    b) Verbal Representations
    c) Pictorial Representations
    d) Discussion & Justification
  4. Calendarize: 10-15 minutes daily
    For example …
    Monday: Make it Number Sense Activity
    Tuesday: Operational Practice
    Wednesday: Word problems
    Thursday: Making math connections
    Friday: Counting patterns, Games, Puzzles (week 1) and Assessment (week 2)
  5. Assess: Include Numerical Fluency (not speed) on assessments. For example, “Write everything you know about two.”
    1+1=2
    2 is even
    2 is the only even prime number
    2 is the square root of 4 ! 5-3=2
    Multiplying by two doubles any number

Though the examples here were mostly elementary the 5 steps still apply to secondary, particularly to the planning of daily activities.


Knowing Your HEARTPRINT: Transforming the Way We Teach and Lead.  — Tim Kanold (HEARTPRINT)

  • The Big Take Away: I define your heartprint as the distinctive impression and marked impact your heart leaves on others.” 
  • Happiness boosts our productivity and heightens our influence over peers.
  • Engagement. From Gallup Poll:
    31% are Engaged Teachers (seek ways to be better)
    57% are Not-Engaged. (unlikely to devote discretionary effort)
    12% are Actively Disengaged (intentionally sabotage)
  • Alliances: Collaborate with other teachers.*
  • Risk. Take chances towards the Clear Vision and using Clear Results (data) to guide journey for OUR students (vs my students).
  • Thought. Are you a person of deep knowledge capacity and wisdom?

This was an inside peek at Tim’s recently published and highly acclaimed book, Heartprint. It was one of the most emotional, inspirational presentation I have ever witnessed. Tim really called us to focus on the core purpose of why we are teachers.
* I refer to Dr. Kanold as the ‘Prince of the PLC movement.” The ‘King’ was Rick Dufour, his friend and mentor. Tim dedicated this book to Rick who passed away this year. 


10 Instructional Tweaks That Every Math Leader Needs to Advocate For and Be Able to Model — Steve Leinwand (AIR)

  • The Big Take Away = Strengthen daily classroom instruction with collaborative structures and coaching, monitored with high-quality, well-analyzed common assessments.”
  • Tweak 1: Cumulative Review
    Most effective strategies for fostering mastery and retention of critical skills is daily, cumulative review at the beginning of every lesson.
  • Tweak 2: Fewer Mindless Worksheets
    Never more than 4 problems on new skill,
    Annual reread of Jo Boaler‘s, Fluency without Fear
  • Tweak 3: Change Homework Structure
    2-4-2 Homework
    2 Problems = New Skills
    4 Problems = Cumulative Skill
    2 Problems = High Order/Justification
  • Tweak 4: Daily Exit Slips
    with 5 minutes to go, every lesson:

    – “Turn and tell you partner what you learned today”;
    – “Individually, on a sticky note, complete this task”;
    – Launch next lesson with “On the basis of yesterday’s exit slip”

  • Tweak 5: Higher Order Questioning
    Why? How do you know? Can you draw it? What do you notice? How are the same? etc
  • Tweak 6: More Substantive Student Discourse
    You = Struggle, Explore & Share
    We = Justify Compare & Debrief
    I = Consolidate
  • Tweak 7: More Productive Struggle
    We need more DOK 2 & 3 tasks, and weekly opportunity for rich and robust tasks
  • Tweak 8: Greater Use of Technology 
    Docu-cams, Class twitter accounts, Desmos etc.
  • Tweak 9: Effective Intervention
    Most are ineffective, because they do not change the approach.
  • Tweak 10: Effective Collaboration
    PLC’s don’t magically make a difference. It is their content and follow up that do.

I have been sporadic with my use of reflections and exit tickets at the conclusion of the lessons. Steve & Patsy have challenged me to be more intentional and diligent in these practices.


Building Leadership Structure — Denise Porter & Kathryn Flores (University Chicago STEM Education)

  • The Big Take Away = A Math Instruction Improvement Program needs a long term plan.
  • The case study that was shared is a project in which the non-profit group provided funding and support of the University of Chicago STEM .
  • Video recordings of exemplary teachers teaching a lesson that was requested by teachers through PD survey.

This speaks to the power of observations and particularly the use of video to model best practices. The question is how to find the time to record and edit lessons, without outside finding.


Conceptual Understanding and Exploration in Mathematics Via Desmos.  — Eric Milou (Rowan University)

  • The Big Take Away = Use of technology tools can support both learning of math procedural skill as well as advanced math proficiencies, such as problem solving and justifying.” 
  • Desmos allows you to:
    – Engage with dynamic motion
    – Create with animation and art
    – Monitor with instantaneous feedback


Ross Taylor Past Presidents Session.

  • Hank Hepner: Have a shared vision and question the assumptions that lead to unproductive beliefs.
  • Steve Leinwand: How can we help our colleagues envision more effective pedagogy? Get teachers to observe each other and debrief every other week:
    – What was impressive, what would you different, a call action?
    – Video recording of exemplar.
    – Focus on only two things, you pick one and I pick one.

More talk of vision and modeling of exemplars.


Developing High School Mathematics Teahcer Leaders  — Mike Steele (University of Wisconsin Milwaukee)

  • The Big Take Away = Prepare teacher leaders with hypothetical scenarios.
  • Directions: Brainstorm how a leader would address the challenges connected to the sample scenario. There are a group of parents in your school who are very unhappy about the math curriculum. They think the program holds back their students. They want their sons and daughters to be challenged, to be successful (generally based on grades or tests scores), and to be able to move ahead in grade level or math courses. The parents indicate that mathematics is a discipline that is learned in steps. The steps need to be clearly defined and when the students succeed in accomplishing the steps, they are moved to the next level or the next course.

High Leverage Leadership Actions That Improve Teaching and Learning.  — Diane Briars (NCTM, Past President)

  • The Big Take Away = There are no quick fixes, and me must act on two fronts: Teachers & Administrators.” 
  • High Leverage Practice #1: Shift emphasis from Answer Getting to Mathematical Understanding
    Once kids know how to do something they don’t want to understand why… You can’t take it back. Understanding facilitates initial learning and retention.
  • High Leverage Practice #2: Collective Professional Growth.
    Support Collaborative Team Culture. All kids are our kids. The unit of change is the teacher team.
  • High Leverage Practice #3: Implementing the 8 Effective Teaching Practices (Principles to Action).
    Tasks First… Examine the tasks in your instructional materials (Higher/lower cognitive demand tasks)? Do ALL students have the opportunity to grapple with challenging tasks. Examine the tasks in your assessments (Higher/lower cognitive demand tasks)?
    … Then focus on Discourse. What do you do after the students do the task? DISCOURSE to advance the math learning of the whole class. It’s not about doing the task; it’s doing the task for a reason, so planning is key, and planning with someone else is even better. Facilitate the anticipation phase of the planning.
  • High Leverage Practice #4: Awareness of the Micromessages about math and students.
    Comments like, “It is immediately obvious that…,” Effort-based vs intelligent-based praise. Observe number of interactions and nature of questions teacher offer based on gender or race.

Shrinking the Equity Gap in Secondary Mathematics Coursework: Implications for College Coursework and Completion.  — Dr. Amy Wiseman  & Chritine Bailie (E3 Alliance)

  • The Big Take Away = Acceleration Works!” 

  • 8th Grade Algebra is Key.
  • Auto Enroll and allow parent “opt-outs” rather than “opt-in.”
  • PD for teachers on supporting “Bubble Students” critical.

Thank you San Antonio for an Epic Trip!

Confirming Answers with Graphing Software

I added two components to a lesson task on rational equations. The first was an idea called Hint Cards which I discussed in a previous post. The second one was having students use Desmos to confirm numerical answers that they found algebraically. This lesson is worth sharing, because of what I discovered that the students didn’t know how to do and what they learned from the activity.

The students had just completed the  Optimum Bait Company task. I gave them 5 minutes to check their answers with Desmos. Mathematically speaking, they needed to confirm that for the equation, , the following were true:

  • C(1000) = 4.45
  • C(4000) = 1.3, C(8000) = 0.775, C(12000) = 0.6 and C(42000) = 0.26
  • The horizontal asymptote is y = 0.25
  • C(5600) = 1

I was struck by how utterly stumped they were on using a graph to check these answers, even though they possessed all the prerequisite knowledge necessary. They understood the context of their answers (The average production cost of 1000 lures is $4.45). They knew how to find a y-value from a graph given the x-value (C(1000) = 4.45). They also were experienced at graphing equations with Desmos (y = (4200 + 0.25x)/x), and they knew how to establish a domain and range for axis in context. While my students had each of these four connected skills, they were missing the connection between them all, so I embraced the teachable moment.

I started with the basic idea that the equation we need to graph was the one for the average cost:  C(x) = (4200 + 0.25x)/x. A major problem faced them, though, when they first graphed this equation… they couldn’t see the rational function in the default window.

Bait Desmos Blank

So my next move with the class, was to use the numeric results to determine the domain and range. The range was simple since we all of the monetary answers were between 0 and $5.00. The domain needed a bit more discussion because the one value of 42000 lures compressed the graph so significantly that the class thought it better to leave it out of the visible domain, so we agreed upon 0 < x < 13000.

Bait Desmos Window

From here I could have just traced with finger along the screen to show where a point with a value of x would be located on the curve, but I wanted to tie in the writing of horizontal and vertical equations, and solutions of systems. Therefore, I had the students enter the additional equation of x = 1000, and click on the point of intersection.

Bait Desmos 1K

The students were getting happier and more confident so we kept rolling by entering a table with the additional increasing values of x, representing the number of lures.

Bait Desmos Table

The table confirmed the students answers and supported their common response that the values were approaching a limit of 25 cents. This appealed to their sense of context that the cost per lure could not drop below the original 25 cents per lure. That made for an easy connection to the finding the horizontal asymptote of the rational function for which the degree of the numerator and denominator are equal, which in this case was also 0.25. So we graphed this as an asymptote. It turns out that it was easier to see how closely the curve approached the asymptote if we temporarily increased our visible domain to the 42000 lures.

Bait Desmos Asymptote

Finally, we entered the equation y = 1 in order to see the number of lures required to drive the average cost down to $1 a lure.

Bait Desmos 1 Dollar

This serendipitous exercise was amazingly productive for reinforcing understanding of graphing in general, as well as the connection between numerical values, algebraic formulas and context.

Hint Cards

Hint CardI added two components to a lesson task on rational equations.The first was an idea called, Hint Cards, shared by Michael Pershan at Shadow Con at NCTM 2015.  The second, which I will discuss in another post, was having students use Desmos to confirm answers that they found algebraically. There were so many surprising positives from this lesson that I have to share.

As always, lesson awesomeness starts with a good task. The class had studied the simplifying, solving and graphing of rational functions. It was time to write and apply them. My school’s Algebra 2 team decided on a common task titled Optimum Bait Company. I’m not sure where the task came from, but it offered the following context followed by six prompts.

My brother Matt owns Optimum Bait Company. Optimum Bait Company manufactures fishing lures. The monthly cost to run the factory is $4200 and the cost of producing each lure is an additional $0.25 per lure.

  1. If he produces 1000 lures in one month, what is the average production cost per lure?
  2. Create a function, C(x), that models the average production cost per lure.
  3. Calculate the average production cost per lure if he produces 4000 lures in one month? 8000 lures? 12000 lures? 420000 lures?
  4. As he produces more lures what price does the average cost of production approach? Why?
  5. If he wants the average cost of production to be $1, how many lures would he have to produce in one month?
  6. If he wants to make a profit of at least $4000 per month, what is the minimum number of lures he would have to produce if he sells every lure he produces for $4?

I was thinking that the students would need a lot of help on this, so I created a set of six Hint Cards. Each card gave some assistance for one of the prompts.

Front of Card

Back of Card

#1: Average Cost of 100 lures

Average = Total Cost/Total Number

#2: Create C(x)

Let x = number of lures

#3: Average Cost per Lure

C(4000) = (4200 + 0.25(4000))/4000

#4: Limit of Average Cost

The Ratio of the Leading Coefficients

#5: Average Cost of $1

C(x) = 1, instead of   x = 1

#6: Profit of $4000

Profit = Income – Expenses

As an incentive, I announced the following scoring system.

  • Like all other tasks, this will be worth 5 points.
  • There are 6 prompts. Every wrong answer to a prompt costs a point.
  • There are also 6 hints. Every hint used costs a point.
  • Yes, that means you either have one free pass on a wrong answer, or a free hint.
  • The only thing that you may ask of the teacher is for a hint card to a specific prompt.
  • 30 minutes will be allotted to complete the task.

I was pleasantly surprised how little they needed or wanted help. Many groups didn’t even take advantage of their free hint. In fact, for all of eight groups, I gave out only seven Hint Cards… total. The most common hints asked for were for #1 and #5. The most commonly missed questions were the last two. I suspect that if I had given more time on the task, students may have ask for more hints and given more effort on what I consider to be the hardest questions for the task. That’s a lesson for next time; there will definitely be a next time because of the benefits that resulted from the Hint Cards technique:

  • The time crunch spurred a hyper-focus in the students.
  • The level and intensity of the student discourse was heightened tremendously.
  • A common dynamic was having one student raise a hand for a hint, while another group member protested, “we don’t need it, yet.”
  • The average score on the task was 4.2 out of 5.

Hint Cards delivered a terrific learning experience for my students. One that I will be sure to give them again.

Mr Cornelius’ Desmos Lesson

This lesson on graphing conic sections rocked on multiple levels. For the students, it involved concrete mastery of standards, conceptual understanding of several topics, higher order thinking skills, student autonomy and intellectual need. For the teacher, Mr. Cornelius of Great Oak High School, it was a week’s worth of experimenting with new software and pedagogy. The genesis of the lesson was a combination of an email and a diagram. I had sent to my Math Department a link to the free online graphing calculator Desmos.com; a mutual colleague, Michael White, shared the idea of having students use their knowledge of equations to graph a smiley face. Mr. Cornelius merged these ideas into a new 5-day lesson in the computer lab. That week produced a multitude of pleasant surprises.

Desmos smile 2

Michael started with a whole-class demonstration of Demos at the end of the period on a Friday. He posed the Smiley Face graph (shown above) as the minimal requirement for passing the assignment. The strength of this lesson is two-fold: 1) There are a variety of equations involved (circle, ellipse, parabola, absolute value, as well as linear), and 2) repeated restriction of the domain and range.

Michael invited students to create their own designs for a higher grade. He expected only a few takers, but in the end only a few decided to produce the Smiley Face, and this is where the richness of the lesson was truly found. During the week-long lab session, I observed one of the days and took a few pictures of some works-in-progress.

Desmos spiderDesmos MinnieDesmos CatDesmos House Alien
As you can see, the students independently chose to include inequalities in order to produce the shading. Here was my favorite use of shading.

Desmos Arnold

What really impressed me about the lesson was the examples of students who asked to learn something new in order to produce something they chose to create. In the example below, a student wanted a curly (wavy) tail for her pig. Mr. Cornelius taught her how to graph sine and cosine waves. Granted, this was a superficial lesson, but to see someone wanting to learn a skill from next year’s course was a treat.

Desmos Pig 1

The rigor that the students imposed upon themselves, again as demanded by their creative idea, was remarkable. Look at the detail of the door handle on this house.

Desmos House Desmos Hinge

Desmos Lesson

My favorite moment was this one with Michael and a handful of students. It is not as sexy as the pictures that the students were producing, but it was far more significant. Three students all had a similar question, so Mr. Cornelius conducted a mini-lesson on the board while the rest of the class worked away on their graphs. The topic on the board was not part of Michael’s lesson plan. It was sheer improvisation. For me, this interaction was the treasured gem of the lesson experience: A teachable moment generated by an intellectual need.

This was the first run of Michael’s lesson and in a conversation that we had while he was grading the assignments he conceded that he needed a scoring rubric. We also discussed how this idea could be woven throughout both Algebra 1 and 2 courses. The idea of Graphing Designs could span linear, exponential, quadratic and conic equations. I smell a lesson plan brewing!

(P.S. For those of you that get hooked on Desmos, I suggest you also check out the Daily Desmos Challenge)

Interpreting the Graph of a Helicopter Flight

A colleague of mine at Great Oak HS, Reuben Villar, found this wicked cool app at Absorb Learning.Helicopter
Click below to access the free online version of the app, by Adrian Watt.

Helicopter App

We incorporated this app in our latest lesson, Tubicopter (sample page here). It intensely challenges student understanding of graphing by directly contrasting the physical flight path of the helicopter and abstract shape of the graph of the relationship between time and the helicopters altitude. Toy with it and leave your comments here.

3 Cool Sites That I Discovered

I have used three web sites for the first time at school over the last couple of weeks.

Estimation 180, Andrew Stadel

Elevator EstimationThe premise here is very interesting: Students acquire number sense better by making mental estimations, than from direct instruction. Since I teach an Algebra class to a large group of high-needs students, who have proven to lack number sense, I thought I would give this one a go. While the name of the site implies estimations for 180 days of the school year, we entered at day 75. The students were hooked right away.

The process that Mr Stadel offers is even more useful than the pictures that drive the site. I have my classes participate in the following manner. My students each record their own estimates, then pair up and record on a lapboard, and then as they hold up their boards, I announce the minimum and maximum values that I see. On the Estimation 180 site, I record either the median of these values or the mode if there is preponderance of one value. Depending on the spread, I decide the level of confidence (1-5), and then submit our collective response under “Great Oak” (our high school). This committment raises the level of engagement of the students, who really want to see how close we get to the actual answer.

The site offers a handout for students to record their estimates, and their margins of error for 20 days on each side of the sheet. The students are to average this margin of error at the end each page. This serves two great purposes: 1) Students must add and divide positive and negative numbers as well as practice calculating a mean, and 2) as students progress through the year, they can see if their estimations are getting anymore accurate (average margin of error getting smaller?).  In only three weeks, I have already seen my students posing more accurate numbers.

I have other processes that I also use as warm-ups, so I won’t be using all 180 days, but the mathematical gains and enthusiasm that I am seeing in my students will encourage me to use this site as often as possible. (Chris Shore’s 180Blog)

Graphing Stories, Dan Meyer & Buzz Math

The premise of this site is that students will develop understanding of graphing through visual contexts, in this case, through 15 second video vignettes. The genius of the site is the consistency of its structure.

Time GraphEvery coordinate plane is a one-quadrant grid with time as the domain, from 0-15 seconds. The range and its scale is left to be defined for each video. Each video is shown with a clock tracking the 15 seconds, then the video and clock are replayed at half speed. The answer is revealed by superimposing the grid over the video. The graph is drawn in real-time as the video plays out. There is a variety of the types of functions offered, as well as various degrees of difficulty.

In my class I used this as remediation for the most commonly missed question on the semester final, graphing from a verbal context. So I used only about 7 of the 24 videos offered, over the course of a few days. On the next quiz, students showed a drastic improvement in their ability to, graph both from verbal context as well as from given equations. (Chris Shore’s 180Blog)

Math Mistakes, Michael Persan

This site is intended for teacher use, rather than student use. Its purpose reflects the hyper-focus of its author: self-improvement. I used this site in my most recent math department meeting. I posed two entries from the site. One sample dealt with fractions, the other with graphing. The discussion ensued around two questions: 1) Why might the students be making these mistakes, and 2) How should we as teachers respond if this were occurring in our classes?

MM Number LineMM Graph

The conversation was brief, but very rich. I used it to encourage our PLC meetings to focus more on instructional decisions. It was very well received by my teachers.