Multiplication, array

Warm Up

Draw an array outside (4 x 4)

Explain that arrays must have equal numbers in rows and columns.  Invite some students to stand in an array.

-4students

-6students

-8 students

Launch

Go through slides 5 onwards

Explore

Use template to demonstrate

1.Roll 2 x 6 sided die. One is for the number of columns, one is the number of  rows.

2.Make the array with counters.

3.Record the equations in different ways

eg – if you roll a 3 and a 5

3 groups of 5 = 15

3 x 5 = 15

5+5+5=15

THEN FLIP

5 groups of 3 = 15

5 x 3 = 15

3+3+3+3+3=15

Stress that these are all ways of showing your thinking 

Show Your Thinking Template

Enable/Extend

ENA: Similar activity but with less equation- choose suitable grid and work with group on the floor. 

EXT: 10 x 10 grid and 10 sided die (print A3 size so that counters fit).