Education Technology

Math TODAY: Coming Clean About Showering Time

Published on 10/17/2008

Activity Overview

Using the USA TODAY Snapshot®, "Coming Clean About Showering time," students will find the measures of central angles and arcs of a circle. They will use circumference, radius,concentric circles, and degrees in a circle to determine the measures of the central angles and arc length.

Before the Activity

Provide one graphing calculator for each student. Each student should have a copy of the corresponding student activity sheet. Provide each student with the following AppVars CIRCLE.

During the Activity

  • Have the students link the AppVars CIRCLE as part of the class period on the previous day or during the beginning of the class period when you are going to use this activity.
  • Review opening an AppVars using Cabri Jr. with your class before starting the activity.
  • Students can work individually or in groups to assist each other during the activity.
  • Have students discuss their discoveries while they work to better understand the relationships.
  • Before starting the AppVars CIRCLE, remind students to carefully read the opening screen and find where the radius and circumference will be placed.
  • After the Activity

  • Review student answers
  • As a class, discuss questions that appeared to be more challenging
  • Re-teach concepts as necessary