Introduction: Prior to beginning the lesson: (1) Photocopy the Problem of the Day onto transparency paper for the overhead projector; (2) Cut out and laminate Vocabulary Cards for display in the clasroom; (3) Photocopy Clay Fractions Activity Sheet (1 per student). Group Size: Partners Learning Objectives: Students will be able to:
Identify Numerator and Denominator.
Identify and write fractions 1/2, 1/3, 1/4, 1/6, 1/8, and 1/10.
Materials: Problem of the Day (see attachment), Clay Fractions Activity Sheet (see attachment), Vocabulary Cards (see attachment), overhead projector, clay or Play-Doh, toothpicks (1 per 2 students) Procedures: Lesson Introduction: Display Problem of the Day on the overhead projector. Ask students: What strategy should we use to solve this problem? Guide them towards draw a picture. Solve the problem together as a class. Students can copy problem and solution into math notebooks.
Divide students into partners. Within each partner group, designate a Partner 1 and a Partner 2. Explain to students they should assist their partner when it is not their turn to solve the problem.
Display Vocabulary CardsFraction, Numerator, and Denominator on the board.
Distribute a handful of clay and a toothpick to each group. Instruct students to shape clay into a flat square.
Tell students: Now I want you to divide your clay into half. Ask students: What is the fraction? Call on one student to write "1/2" on the board. Tell students: Use your toothpick to write one-half on each piece of your clay. Now ask students: What is the numerator? What is the denominator?
Remind students to switch partners and tell them: Next make a flat circle with your clay. Then repeat the same question sequence with one-third.
Remind students to switch partners and thell them: Make a flat square again with your clay. Repeat the same question sequence for one-fourth.
Continuing with a square shape, repeat the same procedure with one-sixth, one-eighth, and one-tenth.
Collect clay and toothpicks from students and distribute Clay Fractions Activity Sheet. Instruct students to work with their partner to draw the fractions they just modeled with their clay.
Modifications: For students with special needs, allow extra time to answer questions and provide one-on-one assistance when necessary. Assessment: Teacher should monitor student participation and independent work to ensure all students understand the concept. Benchmark or Standards: National Council of Teachers of Mathematics (NCTM) Number and Operations Standard:
Develop a sense of whole numbers and represent and use them in flexible ways, including relating, composing, and decomposing numbers.
Understand and represent commonly used fractions, such as 1/4, 1/3, and 1/2.
National Council of Teachers of Mathematics (NCTM) Process Standard:
Communicate their mathematical thinking coherently and clearly to peers, teachers, and others.