• In pairs, one student (the creator) rolls two dice (6 or 10-sided of different colours). The roll of one dice (e.g., black) determines the number of rows, and the roll of the other die (e.g., green) the number in each row.
• The creator uses tiles to make the top row and left-hand column of the partial rectangular array.
How many tiles do I need?
How many tiles do I need?
• The partner (thinker) verbalises the number of rows and number of tiles in each row as a fact, (e.g., 3 × 6).
• The thinker works out the total amount of tiles needed to make the complete array and explains how he/she worked it out and records it in someway.
• The generator uses tiles to check, if needed.
• They then swap roles and repeat the activity.
How many tiles do I need?
I know 3 × 3 is 9 and I doubled it to work out 3 × 6. Another way is to think of 3 × 5 is 15 and add another 3.
How many tiles do I need?
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