MONDAY: A lighthearted story about pizza slices.
Note: I have curtailed the string of expressions a bit. You might, for example, want to insert the expression 3×5×(20+?), and perhaps also 3×(5×20 + 5×?), between my second and third expressions.
WEDNESDAY: Here we look at expressions that give the total number of dots in a (recursive) dice pattern.
Note 2: you might want to ask students to annotate the diagram, or to draw a revised diagram, to show how the dots are being structured by the various expressions.
THURSDAY: Here we use expressions to count dots in some partitioned/compound arrays.
FRIDAY: We look at some neat and some not so neat ways of performing the calculation 15 × 22.
The second task should help students take a more conscious, formal view of the distributive law and to think about when it applies.