Clarifying Lessons

Grade 7

Divide and Conquer

Given problems involving whole numbers, students analyze responses to two different types of division problems and discuss how the inclusion of the language of sharing and grouping will help them recognize situations that require division. Students then solve a sequence of problems organized to provide scaffolding for understanding of an algorithm for division of fractions. Emphasis will be placed on using pictures or diagrams and written descriptions of the thought processes involved to support solutions and the development of an algorithm. TEKS addressed in this lesson: 7.2A, B; 7.5A; 7.14A.

Pipe Cleaners

Students build rectangles with pipe cleaners. Since the pipe cleaners are all the same length, the rectangles will all have the same perimeter. Students investigate the relationship between the base and height of each of these rectangles. Using multiple representations, students collect data in a table, graph the data, and build a symbolic rule relating base and height of rectangles of a given perimeter. TEKS addressed in this lesson: 7.2B; 7.4B; 7.5A; 7.9A; 7.13C, D; 7.14A; 7.15A.