Adding Fractions Cvvd Amy Harrison Tuesday 7pm Roxan Sarrategui Tuesday 4pm

Objectives Students will learn parts of a fractions Student will learn addition of like denominators

California Content Standards Grade Students calculate and solve problems involving addition, subtraction, multiplication, and division 3.2 Add and subtract simple fractions (e.g., determine that 1 ⁄8 + 3 ⁄8 is the same as 1 ⁄2).

Materials Pattern blocks: 5 triangles for each student Paper and pencil Checklist Practice Worksheet

Procedures Prior to the lesson, students should have learned the concept of fractions and know how to write fractions through using pattern blocks. 1. Give a scenario: Tom ate one third of a cake, Bryan ate one third of the cake. What portion of the cake did they eat ? Ask students to investigate the problem by drawing two circles. Divide each circle into three equal parts. Shade one part of each circle and write the sum of shaded fractions. Ask students to write equation for this problem. You may have to model this. 2. Hand out the pattern blocks. Ask students to make a regular pentagon with 5 congruent triangles. Then ask students using the blocks to find the following fraction problems: 1/5 + 2/5 = 3/5 + 1/5 = 4/5 + 1/5 = 2/5 + 3/5 = Manipulate pattern blocks to find the sum of the fractions. Write the equations and the answer students give to each equation on the board 3. Review the answers. Ask students, "What should we conclude from these results? What are the steps in adding fractions?" Let students draw correct conclusion. Summarize on the board: If adding common fractions, add the numerator and keep the denominator the same. 4. Ask students to use pattern blocks to find the answer to the following questions: 2/3 - 1/3 = 4/5 - 1/5 =

Procedures Write equations and answers on the board and then go over the answers. Ask students to say the steps they must take to subtract common fractions by subtracting one numerator from the other but keeping the denominator the same. 5. Give the work sheet to students to practice (see attached file for the sheet). Walk around to check on and assist students. 6. Go over the answers. Students redo the work they missed or was incorrect. 7. Group activity: separate the class into three or four equal groups. Each group is assigned a project. The group needs to have a leader, a writer, a reporter, and problem solvers. The reporter will demonstrate the group work at the end. Project: Find the number of students who have each of these eye colors in your group: blue, brown, other. Write a fraction with the number of students for each eye color and total of the number of students in your group. Add the fractions together. Explain the steps and answer. 8. Each group demonstrates the finding and how they get their answers. Explain the process.

Parts of a Fraction 3 4 = the number of parts = the total number of parts that equal a whole

Parts of a Fraction 3 4 = numerator = denominator

Adding Like Denominators 1/ = Only add the numerators

Simplify Your Answer 4 4 = 1

Add these fractions 1/ = 4 5

Add these fractions 1/ = 3 4

Add these fractions =

=

= 8

Add these fractions = 4

Add these fractions =

=

=

Assessment Students will be assessed in variety of ways: 1. Performance-based assessment requiring students to demonstrate and explain the addition and subtraction of common fraction with pattern blocks, equations and word problems should be assessed formatively. 2. Students are assessed through teacher observation while watching students work with pattern blocks.