1.G.A.3
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. Describe the whole as two of, or four of the shares. Understand for these examples that decomposing into more equal shares creates smaller shares.
Understand halves and quarters. Use the phrases half, and fourth or quarter. Answer how many parts do you see problems. That is, understand the concept of part and whole. Don’t talk about fractions such as 1/2 or 1/4 yet. We want to introduce fractions after introducing division. Next, have your students explain why each of these pictures is half shaded. Finally, give your students this challenge.