Number Sense

X. Class 10

A. Introduction of Geometer's Sketchpad Program

B. Class works through an investigation together that uses the GSP technology

• Similar Triangles

• Angle Bisector

C. Proportional Reasoning

Participants should discuss:

• Analyzing and solving problems involving applications of ratio and proportion
• Determining equivalent forms of proportions

Participants explore some of the following investigations focused on proportional reasoning:

• Bouncing Ball

• Red and Green Marbles

• Math in Motion

• Ratios and Fractions

• Inversely Proportional

D. Participants add write-ups to their online portfolios

E. Adapt an InterMath investigation into an instructional activity for middle school students ­ Whole class or small group activity

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Additional Resources for Week 10

• Dictionary Entries related to proportional reasoning.

• Equivalent Ratios

• Fraction

• Proportion

• Rate

• Ratio

Return to the Number Concept Syllabus