Task# Shake and Spill

Illustrative MathematicsVaries

The purpose of this task is for students to decompose a number as a sum of two other numbers in more than one way. The teacher should demonstrate how to 'shake and spill' the counters as well as how to represent the sum using pictures or equations. The word 'sum' is easily confused with 'some,' especially for young children; take care to use language that the students understand. However, make sure that they understand that they are representing, for example, 3+2, not just 3 and 2 separately.