A student computes how many objects are in a collection that is hidden from view.
Focus on the Child videos are taken from one-on-one interviews with individual children. The interviews are designed to elicit evidence of children’s mathematical thinking. They are not teaching episodes or formal assessments.
A quantity (whole) can be decomposed into equal or unequal parts; the parts can be composed to form the whole. More
Sets can be changed by adding items (joining) or by taking some away (separating). More
Common Core Alignment
Number and Operations: Fractions More