Students group and count cubes to find the volume of buildings, towers, and cubic animals to extend their understanding of partitioning numbers into groups to add. This grouping and partitioning also creates an opportunity to use a variety of reasoning strategies including repeated addition. Students also explore ways to represent those partitions with number sentences, cube models, and descriptions.

EXPECTATIONS
	Use this list of expectations to assess students on the key concepts and skills in this unit.
E1*	Solve problems involving volume using repeated addition and skip counting.
E2	Represent the volume of an object using symbols, connecting cubes, and number sentences.
E3*	Measure and estimate volume by building models and counting cubic units.
E4*	Read and write time to the nearest hour and half hour using analog and digital clocks.
E5	Recognize that different shapes can have the same volume.
E6	Justify a solution using visual and spatial reasoning.
E7*	Demonstrate fluency with the addition facts in Group B (3 + 0, 4 + 0, 4 + 1, 5 + 1, 6 + 1, 5 + 2, 6 + 2, 5 + 3, 7 + 1, 8 + 1).
E8*	Determine the unknown number in an addition or subtraction sentence relating three whole numbers for the facts in Group B.
	* Denotes Benchmark Expectation