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Using Theoretical Constructs to Inform Teaching. John Mason IMEC9 Sept 2007. Outline. Teaching Mathematics Tasks, activities, experience, reflection Teaching People To Teach Mathematics Consistency Awareness of the role of Tasks, activities, experience, reflection. My Methods.

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Presentation Transcript
outline
Outline
  • Teaching Mathematics
    • Tasks, activities, experience, reflection
  • Teaching People To Teach Mathematics
    • Consistency
    • Awareness of the role of
      • Tasks, activities, experience, reflection
my methods
My Methods

The canal may not itself drink, but it performs the function of conveying water to the thirsty

  • Experiential

What you get from this session iswhat you noticehappens inside you you, and how you relate that to your own situation

  • Reflection
    • Linking to theories
    • Preparing to notice more carefully in future
    • Brief-but-vivid accounts
one sum

The square of the larger added to the smaller?

  • The square of the smaller added to the larger?

Don’t calculate!!!

Conjecture!

Only then Check!

One Sum
  • I have two numbers which sum to 1
  • Which will be larger:
one sum diagrams

a

a

One Sum Diagrams

1

(1-a)2

1

1-a

a2

Anticipating,not waiting

decimal

2.499…97

2.497

2.479…9

2.479

Decimal
  • Write down a decimal number between 2 and 3
  • and which does NOT use the digit 5
  • which DOES use the digit 7
  • and which is as close to 5/2 as possible

2.47

2.49…979…

difference of two
Difference of Two
  • Write down two numbers which differ by 2
  • And another pair
  • And another pair
  • And another pair which obscure the fact that the difference is 2

Fractions?

Decimals?

9999 & 10001

Negatives?

… ?

characterising
Characterising
  • What numbers can be two more than the sum of four consecutive whole numbers?

What numbers can be one more than

the product of four consecutive numbers?

What did you do first?

Do you encourage your learners to do this?

How often do you set tasks for themwhere they need to do this?

sketchy graphs
Sketchy Graphs

Sketch the graphs of a pair of straight lines whose y-intercepts differ by 2

Sketch the graphs of a pair of straight lineswhose x-intercepts differ by 2

Sketch the graphs of a pair of straight lineswhose slopes differ by 2

Sketch the graphs of a pair of straight linesmeeting all three conditions

more or less altitude area

area

more

same

less

altitude

more

more altless area

more altmore area

more altsame area

Same altmore area

same altless area

same

less

less altmore area

less altsame area

less altless area

More Or Less Altitude & Area

Draw a scalene triangle

more or less area perimeter

area

more

same

less

perimeter

more

more perimless area

more perimmore area

more perimsame area

Same perimmore area

same perimless area

same

less

less perimmore area

less perimsame area

less perimless area

More Or Less Area & Perimeter

Draw a rectangle

When can it be done? When can it not be done?

omar khayam
Omar Khayam

In childhood we strove to go to school,
Our turn to teach, joyous as a rule
The end of the story is sad and cruel
From dust we came, and gone with winds cool.

Pursuing knowledge in childhood we rise
Until we become masterful and wise
But if we look through the disguise
We see the ties of worldly lies

Myself when young did eagerly frequent
Doctor and Saint, and heard great ArgumentAbout it and about: but evermore
Came out by the same Door as in I went

mga dtr
MGA & DTR

Doing Talking Recording

powers
Powers
  • Specialising & Generalising
  • Conjecturing & Convincing
  • Imagining & Expressing
  • Ordering & Classifying
  • Distinguishing & Connecting
  • Assenting & Asserting
themes
Themes
  • Doing & Undoing
  • Invariance Amidst Change
  • Freedom & Constraint
  • Extending & Restricting Meaning
protases

Habit forming can be habit forming

One thing we do not often learn from experience, is that we do not often learn from experience alone

Absence of evidenceis NOTevidence of absence

A sequence of experiences does not add up to an experience of that sequence

Protases
implicit contract
Implicit Contract
  • If learners ‘do’ the tasks they are set, then they will ‘learn’ what is required
    • Contrat didactique
  • The more clearly and specifically the teacher specifies the behaviour sought, the easier it is for learners to display that behaviour without encountering mathematics, without thinking mathematically
    • Didactic tension
task activity
Task & Activity
  • A task is what an author publishes, what a teacher intends, what learners undertake to attempt.
    • These are often very different
  • What happens is activity
  • Teaching happens in the interaction made possible by activity: performing familiar actions in new ways to make new actions
  • Learning happens through reflection and integrating new actions into functioning

Teaching takes place in timeLearning takes place over time

worlds of experience

Inner World of imagery

Worldof Symbols

Material World

Worlds of Experience

enactive

iconic

symbolic

worlds mga dtr
Worlds, MGA, DTR
  • Enactive-Iconic-Symbolic
    • Three modes; three worlds
  • Manipulating–Getting-a-sense-of–Articulating
  • Doing–Talking–Recording
further reference
Further Reference
  • Mathempedia (http://www.ncetm.org.uk)
  • Fundamental Constructs in Mathematics Education, RoutledgeFalmer, London (2004).
  • Designing and Using Mathematical Tasks. St. Albans: Tarquin.

[email protected]

http://mcs.open.ac.uk/jhm3

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