Upload
tausiq
View
25
Download
0
Embed Size (px)
DESCRIPTION
Necessary Movements of Attention. John Mason ATM March 2009. Calculate. Comparisons. What is the same and what different about 7, 14, 21?. What was the same and what different about the two tasks? ‘difference’ associated with subtraction; N o word for multiplicative comparison? - PowerPoint PPT Presentation
Citation preview
1
Necessary MovementsNecessary Movementsofof
AttentionAttention
John MasonJohn MasonATMATM
March 2009March 2009
2
CalculateCalculate
€
10000 × 10004−10002 × 999810000 × 10000−10001× 9999
€
€
1234321234321× 2468642468641−12343212343201234321234320 × 2468642468641 + 1234321234321
3
ComparisonsComparisons
€
10000× 10004−10002× 999810000× 10000−10001× 9999
€
1234321234321× 2468642468641−12343212343201234321234320 × 2468642468641 + 1234321234321
What is the same and what different about 7, 14, 21?
What was the same and what different about the two tasks?
‘difference’ associated with subtraction;No word for multiplicative comparison?
So how do we educate awareness of a useful shift of attention to multiplicative comparison?
When do we use multiplicative-comparison naturally?
4
AttentionAttention
MacroMacro– LocusLocus– FocusFocus– MultiplicityMultiplicity
MicroMicro– Holding Wholes (gazing)Holding Wholes (gazing)– Discerning DetailsDiscerning Details– Recognising RelationshipsRecognising Relationships– Perceiving PropertiesPerceiving Properties– Reasoning (solely on the Reasoning (solely on the basis of agreed basis of agreed properties)properties)
EducableEducable– Additive Additive Multiplicative comparison Multiplicative comparison– Discrete Discrete Continuous Continuous– Reacting Reacting Responding (rules Responding (rules tools) tools)– ‘‘just is’ just is’ social social abductive & abductive & deductive reasoningdeductive reasoning
5
Odd One OutOdd One Out
Which is the odd one out?Which is the odd one out?
6
Seeing AsSeeing As
✎ Raise your hand when you Raise your hand when you can see the diagram as can see the diagram as illustratingillustrating1/3 of something1/3 of something1 : 21 : 2
✎ What else can you ‘see as’?What else can you ‘see as’?
7
Square CountSquare Count
8
BaggedBaggedThe number of counters in a bag is deemed to be the total number of counters in all the bags contained in that bag.
The ‘bag-depth’ of a bag is the maximum number of bags within bags within bags … in that bag.
For what numbers of counters is it possible to have a bag containing that many counters, subject to the constraint that each bag contains exactly one more counter than its bag depth?
9
Triangle CountTriangle Count
10
RegionalRegional
Arrange the three coloured Arrange the three coloured regions in order of arearegions in order of area
11
Reading a Diagram: Seeing As …Reading a Diagram: Seeing As …
a
a
x3 + x(1–x) + (1-x)3
x2 + (1-x)2x2z + x(1-x) + (1-
x)2(1-z)xz + (1-x)(1-z)xyz + (1-x)y + (1-x)(1-y)(1-z)yz + (1-x)(1-z)
12
TopicsTopics
CountingCounting Angle MeasureAngle Measure Ratio (Thales)Ratio (Thales) TrigonometryTrigonometry FunctionFunction
13
Gelett BurgessGelett Burgess
Remarkable truly, is Art!See — Elliptical wheels on a Cart!It looks very fairIn the Picture up there;But imagine the Ride when you start!
14
Stressing & IgnoringStressing & Ignoring
15
ConstructsConstructs
AAnglengle LLengthength FFractionraction RRegular shapeegular shape DDimenaionimenaion SScalecale DDy/dxy/dx TTransformationransformation GGraphraph UUnknown; variable; functionnknown; variable; function EEquivalencequivalence DDifferenceifference PPerimetererimeter identityidentity
EquationDenominator numeratorPrimeFactor
16
Length-Angle ShiftsLength-Angle Shifts
What 2D shapes have the property What 2D shapes have the property that there is a straight line that there is a straight line that cuts them into two pieces that cuts them into two pieces each mathematically similar to each mathematically similar to the original?the original?
17
Symbol DecodingSymbol Decoding
€
2k+ 1( )k= j( )
j=1
n−1
∑
j+1( )j=1
n−1
∑
∑ =n3 1 = 11 = 133
3 + 5 = 23 + 5 = 233
7 + 9 + 11 = 7 + 9 + 11 = 3333
18
Geometric MultiplicationGeometric Multiplication
Use Thales Theorem to calculate, Use Thales Theorem to calculate, given x, ygiven x, y, , and zand z;;
xxy/zy/z x/yzx/yz 1/x+1/y1/x+1/y