rye fractions
DESCRIPTION
This presentation on Fractions was for Grades 4 to 6 teachers from elementary and middle schools of Rye City School District in New York.TRANSCRIPT
teachingfractions
Yeap Ban HarNational Institute of Education
Nanyang Technological UniversitySingapore
Slides are available for download fromwww.banhar.blogspot.com or www.mmepdpm.pbworks.com
Grade 1 materials, consolidated over four years build the foundation for Grade 5 and Grade 6 materials.
GradeWhole Number
DivisionDecimal & Fraction
Division1 Sharing /
Partitive DivisionGrouping /
Quotitive Division2 12 boys ÷ 4
3 15 boys ÷ 451 boys ÷ 3
133 boys ÷ 74 1248 boys ÷ 6
15 kg ÷ 40.24 ÷ 4
5
6
7 Everything else
teachingfractions
4154
15 3
3
2
4
33
4
3
2
1
How many thirds are there in 1 whole?
How many thirds are there in 1 whole?
How many thirds are there in 2 wholes?
teachingfractions
How many thirds are there in 1 whole?
How many thirds are there in 2 wholes?
3
11
3
12
How many thirds are there in ?3
21
Grade 4 Grade 6
How many thirds are there in ?6
5
3
1
6
5
teachingfractions
3
21
How many 2 thirds are there in 1
whole?
3
21
This is a 2-thirds.
This is half of 2-thirds.
teachingfractions
6
1
2
1
How many sixths are there in 1 half?
How many sixths are there in 1
whole? 1 half?
6
1
2
1
66
11
3
1
6
5
extensiveuse of visuals
in textbooksdeveloping visualization
developingvisualizationHow Can I Help My Students See It?
Adding like fractions, sum less than 1
Adding unlike, related fractions, sum less than 1
Adding like and related fractions, sum more than 1
Adding unlike fractions, sum less than 1
Adding unlike fractions, sum more than 1
Adding mixed numbers
spiralcurriculum
featuresofsingaporemath
keyusing fractions as a case study
conceptualunderstanding
concrete pictorial abstract
mathematicalvariations
thank you
www.banhar.blogspot.comfor addresses of websites and blogs of various
aspects of singapore math
teachingfractions