Standard: 1.G.3

Subject Area: Mathematics (NYS P-12 Common Core)

Grades: Elementary, 1st Grade

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.

Standard: 2.G.3

Subject Area: Mathematics (NYS P-12 Common Core)

Grades: Elementary, 2nd Grade

Partition circles and rectangles into two, three, or four equal shares, describe the shares using the words halves, thirds, half of, a third of, etc., and describe the whole as two halves, three thirds, four fourths. Recognize that equal shares of identical wholes need not have the same shape.

Standard: 3.NF.1

Subject Area: Mathematics (NYS P-12 Common Core)

Grades: Elementary, 3rd Grade

Understand a fraction 1/b as the quantity formed by 1 part when a whole is partitioned into b equal parts; understand a fraction a/b as the quantity formed by a parts of size 1/b.