Lesson objective: Students will apply their knowledge of using models to represent division and multiplication.
This lesson provides an opportunity for students to apply their knowledge and understanding of using models to a mathematical situation. Students are asked to determine how cookies can be shared equally among friend.
Key Concepts students will use:

unitizing underlies the idea that products of whole numbers can be interpreted as a number of groups of a number of objects.
 quotients of whole numbers can be interpreted as a number of shares (partitive or distribution division) and a number of groups (quotative or measurement division).
Skills students will use:
 representing division and multiplicatiton through the use of arrays, equal groups, number lines, repeated addition or repeated subtraction models.
 students will practice with the inverse property of multiplication and division.
Students engage in Mathematical Practice 1 (make sense of problems and persevere in solving them) as they model multiplication and division using diagrams, arrays, number lines, drawings, etc.
Key vocabulary:
 array
 equation
 factor
 dividend
 division
 division
 multiplication
 product
 quotient
 repeated addition
 repeated subtraction