(3.NF.A.3d). In Topic D, students transfer their work to the number line. They begin by using the interval from 0 to 1 as the whole. Continuing beyond the first interval, they partition, place, count, and compare fractions on the number line (3.NF.A.2a, 3.NF.A.2b, 3.NF.A.3d). In Topic E, they notice that some fractions with different units are placed at the exact same point on the number line, and therefore are equal (3.NF.A.3a). For example, , , and are equivalent fractions (3.NF.A.3b). Students…
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