Education Technology

# Activities

• ##### Subject Area

• Math: Geometry: Reasoning

9-12

45 Minutes

• ##### Device
• TI-83 Plus Family
• TI-84 Plus
• TI-84 Plus Silver Edition
• TI-Navigator™
• ##### Software

LearningCheck™ Creator

## Preparing for Proofs

#### Activity Overview

This activity introduces students to the terms of hypothesis, conclusion, conditional, converse, inverse, contrapositive, and biconditional using popular advertising slogans. A learning check activity is used to check their understanding following the activity.

#### Before the Activity

Have old magazines and newspapers on hand to help students who have trouble coming up with a common advertising slogan on their own.

#### During the Activity

Students, in small groups, will identify a slogan of a well-known company or product and make a hypothesis and conclusion in the form of a conditional statement, its converse, inverse, contrapositive and, if applicable, the biconditional. After two of these they will make up a company and slogan---again applying the statements. There will be a learning check activity using slogans to determine the understanding. Follow-up checks may be necessary if students are struggling with the concept. Finally a learning check activity involving a math concept will be applied.

#### After the Activity

Review student results and, as a class, discuss questions that appeared to be more challenging. Re-teach concepts as necessary.