## Fraction Squares

Middle School Lessons & Materials || Contents

An Explorer lesson plan. Download a Claris Works or Acrobat file from the Explorer site. Also information on grades, availability, description, curriculum, process skills, author, and publisher.

Author: Joanne Caniglia

Description: Students practice subtraction using a square diagram.

Objectives: To subtract fractions with like and unlike denominators.

Resources/Materials: Circle grid

Activities/Procedures:

1. On poster board students are to draw a figure similar to the one below.

2. Laminating the drawing enables students to write on it many times with overhead or dry erase pens.

3. The four outer squares should contain a fraction. Instruct students to subtract the smaller fraction from the larger one and place the answer in the circle that appears as the midpoint of the two fractions in the problem.

4. Students are finished when they come to the center.

Evaluation:

Students can check their work as they work backwards - starting in the center and adding the midpoint circle and the smaller of the endpoint circles. This process reinforces addition of fraction.

Follow-up Activities (Optional):

Students can find four different fractions to place in the corners that will produce all ones or zeros. The success of this activity is based upon a property called the Density Property for Rational Numbers. Ask students if they believe that it is true that between any two rational numbers there is another rational number.