## Lesson: Fractions and Wholes

Developing the Concept

Review the concepts taught in the Introducing the Concept lesson. Explain to children that they will be using models to learn more about fractions.

**Materials:** copies of shapes as shown on Worksheet 3 (PDF file) for each child; set of 20 marbles, 5 each of red, black, yellow, and blue; four plastic bags of marbles, each with a randomly distributed even number of red, black, yellow, and blue marbles in it; red, blue, yellow, green, purple, and orange crayons for each child

**Preparation:** Copy Worksheet 3 (PDF file) for each child. Put an even number of marbles into each of 4 bags, distributing the colors at random. It does not matter if each bag has the same total number of marbles in it.

**Prerequisite Skills and Concepts:** Children should be familiar with identifying fractional parts and writing fractions.

**Wrap-Up and Assessment Hints**

Children will need a great deal of practice working with fractions in order to become comfortable identifying and using them. Take time each day to point out classroom objects that can be easily divided into fractions (rulers, clocks, and so on.) Try doing some class surveys in which students determine what fraction of the class possesses a certain attribute (for example, red hair, blue eyes) or kind of pet (dog, cat, hamster, fish, and so on.) Pay attention to how children participate in these activities and make sure that no one is having trouble with particular concepts.