Visual Stimuli

in

Mathematics

 

Dan Meyer teaches high school math outside of Santa Cruz, CA, and explores the intersection of math instruction, multimedia, and inquiry-based learning.  He first came to my attention through this video clip -  Click here

He promotes the use of real life visual stimuli and adopts the mantra that less is more.  Stripping back problems and both engaging and challenging pupils. A key question he encourages is "What Can You Do With That?"  [WCYDWT] At the same time, we shouldn’t underestimate the hookiness of “How do we find solutions to this equation?” and appreciate that visual stimuli is not the only way forward.

His videos can be found on Vimeo (free registration for downloads) and can be found by Clicking here

This clip shows how Dan engages a class - Click here

 

Three-act structure works for a play, a romantic seduction, the 1st Marine Division marching up to Baghdad. It’s the architecture for a WWE wrestling match, a Frank Gehry concert hall or an infomercial.

Storytelling gives us a framework for certain mathematical tasks that is both prescriptive enough to be useful and flexible enough to be usable.

Act One

Introduce the central conflict of your story/task clearly, visually, viscerally, using as few words as possible.

The visual is clear. The camera is in focus. It isn't bobbing around so much that you can't get your bearings on the scene. There aren't any words. And it's visceral. It strikes you right in the terror bone.

With math, your first act looks something like this:

Act One is the hook. “A priest, a rabbi and a gerbil walk into a bar … ” The purpose of the first act is to engage the audience. The greatest Act One ever is a roller coaster. Up, up, up and then … over the falls! You’re hooked. Two other aspects of a great beginning: it must be unique and it must make a promise. A great fishing lure is a shiny, eye-catching object that makes the prey think, “Ah, a delicious meal!”

Act Two

The protagonist/student overcomes obstacles, looks for resources, and develops new tools.
 

What resources will your students need before they can resolve their conflict? The height of the basketball hoop? The distance to the three-point line? The diameter of a basketball?
 
What tools do they have already? What tools can you help them develop? They'll need quadratics, for instance. Help them with that.

Act Two is deepening complications. This is the meat of the project. Billy Wilder said, “In Act One, get your hero up a tree; Act Two, set the tree on fire; Act Three, get the hero down from the tree.”

The first movement of a symphony establishes the musical theme. The middle movements exhaust variations on the theme. Our middle passage—whether it’s a novel, a startup or a philanthropic venture—plays out the promise of the beginning to the point of excruciation. Think of making love. Think of a great meal. Think of middle age.

Act Three

If we've successfully motivated our students in the first act, the payoff in the third act needs to meet their expectations. Something like this:
 

Make sure you have extension problems (sequels, right?) ready for students as they finish.

Article taken from here

Act Three is the payoff. The release of tension. The climax. The resolution of the dilemma.  In the third act we learn if the defendant will be hanged or go free. Will Janie and Joey get married? Do the good guys win or lose?

For some reason, the human mind loves items that come in threes. That’s the key to laying out our structure - Extracts taken from here

In my opinion the following clips of Dan's best exemplify his philosophy:

The Bone Collector - http://blog.mrmeyer.com/?p=1510

Stacking Cups - http://blog.mrmeyer.com/?p=692

The Worlds Largest Coffee Cup - http://threeacts.mrmeyer.com/hotcoffee/

Graphing Stories - http://blog.mrmeyer.com/?p=10535

Speed Problems to adapt

Two men running towards each other at 4m/s and 6m/s respectively are 1km apart.  How long will it take before they meet?

A train of length 180m approaches a tunnel of length 620m.  How long will it take the train to pass completely through the tunnel at a speed of 54km/h?

A train of length 100m is moving at a speed of 50km/h.  A horse is running alongside at a speed of 56km/h.  How long will it take the horse to overtake the train?

Shower v Bath - http://vimeo.com/30166690

Drink Ratios - http://vimeo.com/20628942

Consider a similar problem using discrete objects (e.g., playing cards. Take 10 red cards and 10 black cards face down in separate piles. Take four at random from red pile; mix into black pile. Shuffle. Return four random cards face down to red pile. Ask: more black in the red pile or red in the black pile. Try this several times. If you’re not convinced, do it with the faces showing. Apply principle to soda problem.

Video passing a car on a journey through three traffic lights which are close together and pose the question what is the chance that I will get through without being stopped by a red light?

Car Indicators  - 2 Cars http://vimeo.com/29930938 

                      3 Cars   http://vimeo.com/29930940

Hammer Parabola - http://vimeo.com/28280521

Basketball Parabola - http://vimeo.com/16597874

Water Tank Filling - http://vimeo.com/9632608

Geometry Problem - http://vimeo.com/27451133

Loads of Money - http://vimeo.com/26163161

Diagonals Investigation - http://vimeo.com/32301200

MaxBox is one of many investigations which could be presented in this way

Probability Decision - http://vimeo.com/32756849

Simultaneous Equations Questions to adapt

A bag contains 40 coins, all of them are either 2p or 5p coins.  If the value of the money in the bag is £1.55, find the number of each kind.

Thirty tickets were sold for a concert, some at 60p and the rest at £1.  If the total raised was £22, how many had the cheaper tickets?

Sequences Problem to Adapt

Present a coordinate patterns diagram and show it building up with some key coordinates indicated and then pose the question.

Mr. Piccini's has put together some of his own 3 Act Story Telling problems inspired by Dan's approach - Click here
   

These problems are taken from Higher Tier GCSE papers where all that is left is the diagram and the challenge includes devising suitable questions to solve - Click here

These problems are adapted from the Bowland task 'You Reckon' - Click here

Suffolk 'Dan Meyer' Project

Project Aims:

To increase student motivation/engagement

To give students more ownership of their own learning

To equip our students with better problem solving skills which they can use to solve a variety of problems

Underlying principles for the lessons should be:

Give minimal information about the problem

Have a visual stimulus

Include the use of multi-media

Have a key question

Situate the problem in a meaningful context

Have closure to the problem.

Those involved the project are:

Gill Larkin
gill.larkin@suffolk.gov.uk

Mark Greenaway
mgreenaway@st-albans.suffolk.sch.uk

Mohammed Ibrahim, Chantry
mib@chantryhighschool.org.uk

Gareth Jones, Sudbury Upper
gjones@sus.suffolk.sch.uk

Darren Page, Stowupland
d.page@stowupland.suffolk.sch.uk

Lydia Unwin, Leiston High
floss15@btinternet.com

 

Lesson Idea 1

Real Life Graphs - Filling Beakers

The key steps in this lesson are:

  1. Vocabulary

  2. Open Discussion using an unlabelled graph

  3. Pause Video Clip of 3 beakers being filled at a constant rate, get pupils to predict which will fill first with a reason

  4. Play clip and get pupils to  reflect on their thinking or on each others.

  5. Pupils to decide which beaker match graph A with reason.

  6. Decisions to be made on numbers and labelling of axes Calculate/estimate volume of beaker A.

  7. Sketch graph for the other two beakers.

  8. Draw a beaker that would generate line B.

  9. Bath Filling Activity

  10. Tackle the original exam question the graph is taken from.

Parts of this PowerPoint are to be projected and other sections are to support the teacher - Click here

The PowerPoint refers to this Movie Clip - Click here

Related nrich activities

http://nrich.maths.org/7419

http://nrich.maths.org/6424

http://nrich.maths.org/6425

Lesson Idea 2

Overtaking Lorries - Clip
Watch first 1:10 and then pose the question as to how long the white truck will take to pass the oil tanker

Related nrich activities

http://nrich.maths.org/5990

Lesson Idea 3

Packaging Coke Cans - Click here
PowerPoint Extension - Click here

Design a Container which holds 300ml - Click here
Using Similarity with Drinks Cans - Click here

Related nrich activities

http://nrich.maths.org/5888
http://nrich.maths.org/2664