Date post: | 15-Jul-2015 |
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Filling in Knowledge Gaps:
Critical lessons across grade levels
1-3 for students in grade 4-6
NCTM - 2015 Annual Meeting & Exposition - Boston
Cassy Turner
SingaporeMathSource.com SingaporeMath.com
Cassy Turner
Twitter Bio: Passionate about Singapore Math,
Teacher/Trainer/Coach/Treasure Hunter/ Learner
Answer to the ultimate question? 42.
Handout and slides at:
singaporemathsource.com/
resources/handouts
Development of Addition and Subtraction
Grade 1
Number Bonds
With strategies to 40 and 100
Grade 2
Vertical algorithm within 1000 (Main lessons)
Grade 3
Vertical algorithm within 10,000
Grades 4 - 6
Review and apply algorithm to larger numbers
2
?
10
2278
?
3B Mental
Math
4A Four Operations of Whole Numbers
4B Decimals
Development of Addition and Subtraction
Grade 1
Number Bonds
With strategies to 40 and 100
Grade 2
Vertical algorithm within 1000 (Main lessons)
Grade 3
Vertical algorithm within 10,000
Grades 4 - 6
Review and apply algorithm to larger numbers
7 + 6 = ?
Making Ten
3 3
7 + 6 = ?
Making Ten
3 4
22 - 3 = ?
Grade 1 - Addition and Subtraction: Numbers to 40
onestens
onestens
3-22
12
10 22
- 3
9
1
1
12
onestens
Grade 2
Development of Addition and Subtraction
Grade 1
Number Bonds
With strategies to 40 and 100
Grade 2
Vertical algorithm within 1000 (Main lessons)
Grade 3
Vertical algorithm within 10,000
Grades 4 - 6
Review and apply algorithm to larger numbers
Regrouping/Renaming
onestens24 + 37
110 10
1
11
1 1 1
1 1 1
1
101010
Regrouping/Renaming
onestens24 + 37
110 10
101010
10
24
+ 371
1
6
Addition and Subtraction – What’s Next?
Grades 3 - 6
Review and apply algorithm to larger
numbers
Development of Multiplication/Division
Grade 2
Understand multiplication and division as
related operations
Learn multiplication and division facts for 2,
3, 4, 5 and 10
2A
Multiplication
2A Division
Grade 3
Multiply a 2- or 3-digit number by a 1-digit
number
Division algorithm, including remainders
Learn multiplication and division facts for 6, 7, 8,
and 9.
Area & Perimeter
Development of Multiplication/Division
3A Multiplying Tens and Ones
36 x 3
30 610 10 10
1
11
11
1
onestenshundreds
10 10
10
10
10 10
10
10
10
1
11
11
1
1
11
11
1
1
11
11
1
onestenshundreds
10 10
10
10
10 10
10
10
10
1
11
11
1
1
11
11
1
1
11
11
1
10
onestenshundreds
10 10
10
10
10 10
10
10
10
1
1
1
11
11
1
10
100
3A Quotient and Remainder
53 ÷ 2= ?
tens
2
2 53
-4
1
10 10 101010
111
onestens111
111
11
11
53 ÷ 2= ?
tens ones
2
2 53
-4
1 3
10
10
10
10
1
onestens
11
11
11
1
1
11
11
6
-1 21
R 1
Grade 3
Multiply a 2- or 3-digit number by a 1-digit
number
Division algorithm, including remainders
Learn multiplication and division facts for 6,
7, 8, and 9.
Area & Perimeter
Development of Multiplication/Division
3A
Multiplication by 7
3A
Multiplication by 7
3B Area
Grade 4 Multiply with 10,000 by a 2-digit number
Find factors and multiples with 100
Use divisibility rules for 2, 3, 5, 6, 9 and 10
Use Order of Operations to solve expressions
Area, Perimeter & Volume
Grade 5 Divide numbers to 10,000 by a 2-digit divisor
Multiplication/Division – What’s Next?
Development of Fractions
Grade 1
Halves and fourths
Grade 2
Name and illustrate fractions as parts of a
whole to twelfths.
Order unit fractions
2B Fractions
Development of Fractions
Grade 3
Compare fractions by numerators and
denominators
Find equivalent fractions and simplest form of
a fraction
Fractions and Measurement
Fraction of a Set
3B Comparing
Fractions
3B
Equivalent
Fractions
3B Fractions and Measurement
Fractions – What’s Next?
Grade 4
Add and subtract like and related fractions
Convert between mixed numbers and
improper fractions
Multiply a fraction by a whole number
Grade 5
Multiply a fraction by a fraction
Divide a fraction by a whole number
Divide a whole number by a fraction
Decimal Development
Grade 3
Add and subtract money
Multiply & divide money
Grade 4
Understand, locate on a number line and
compare tenths, hundredths, thousandths
Apply four operations up to 2 decimal places
Convert fractions to decimals
Grade 5
Apply four operations up to 3 decimal places
Development of Bar Modeling
Grade 2
Examples in materials to explain fractions
Grade 3
Introduces part-whole and comparison models
for four operations
Explain equivalent fractions
Jamie has 6 apples.
Kara has 8 apples.
How many apples do they have altogether?
Jamie has 6 apples.
Kara has 8 apples.
How many apples do they have altogether?
6 8
?
They have 14 apples altogether.
?
86
Sam scored 9 points in the basketball game.
Keisha scored 6 points. How many more
points did Sam score than Keisha?
Sam
Keisha
Sam scored 9 points in the basketball game.
Keisha scored 6 points. How many more points
did Sam score than Keisha?
Sam
Keisha
?6
99
?6
A refrigerator costs $1739. An oven is $850 cheaper
than the refrigerator. Mrs. Coles buys both the
refrigerator and the oven. How much does she pay?
Step 1:
How much for the oven?
Step 2:
How much altogether?
fridge
oven?
$1739
$850?
$1739 – $850 = $889
The oven cost $889
$1739 + $889 = $2628
Mrs. Coles paid $2628 for the
oven and refrigerator.
3A Two-Step
Word Problems
Multiplication and
Division
Bar Modeling – What’s Next?
Grade 4
Two step word problems for four operations
Two step word problems involving fractions
and decimals
Grade 5
Multi-step word problems for four operations
Multi-step word problems with average rate,
ratio and percentage
Questions?
Handout:
singaporemathsource.com/resources/handouts
More info: Singaporemath.com
Thanks for
coming!