Weston Public Schools, CT

Bar Models in Primary Mathematics Grades 7 – 8 & Special Education

Yeap Ban Har

Group 2

August 22, 2013

12 noon to 3.00 p.m.

www.banhar.blogspot.com

Jim bought some chocolates and gave half of them to Ken. Ken bought some sweets and gave half of them to Jim. Jim ate 12 sweets and Ken ate 18 chocolates. After that, the number of sweets and chocolates Jim had were in the ratio 1 : 7 and the number of sweets to chocolates Ken had were in the ratio 1 : 4.

Source | Singapore Examination and Assessment Board

Source | Keming Primary School, Singapore

Lesson 8 |

5

2of the boys and

7

3of the girls chose to go on a field trip.

In a group of 94 students, 39 chose to go on a field trip.

Lesson 9 |

Progression in Bar Modeling K – model with real objects or pictures 1 – model with pictures and unifix cube 2 – model with bar for known quantities 3 – model with bar for unknown quantities 4 – model with bar for more than one variable 5 – model using complex strategies such as cutting the bar

Summary |