Partition circles and rectangles into two and four equal shares, describe the shares using the words halves, fourths, and quarters, and use the phrases half of, fourth of, and quarter of (Shapes and their Attributes Reasons).
Describe the whole as two of, or four of the shares. Understand for these examples that decomposing into more equal shares creates smaller shares.
Write the word fourth and one fourth on the board. Tell students that they will be exploring shapes that have been divided into four equal parts. These four parts are called fourths. Each part represents one-fourth. Explain that each part is one-fourth of the whole shape. Give each student the Four Equal Parts sheet for students to complete.