Strand: Number Sense and Numeration - Multiplication
Strategy: Doubling
This game is from the Number Sense and Numeration Guide to Effective Instruction K-3
Materials
• Last One to School game sheet (BLM11)
• 10 counters per player
• 1 ten-sided number cube (or a spinner on BLM4)
-recording sheet or whiteboard with dry erase marker
Overview:
Students spin and record the double of that number removing a counter from the gameboard with that double.
How this supports student learning:
Learning their doubles is the pre-cursor to multiplying by 2. A strong knowledge of doubles will help support decomposing other facts into partial products and doubling these. For example; to help solve 6 X 4 a student may use their knowledge that double 6 is 12 (2 X 6 = 12) and then double 12 is 24 to get the answer to 6 X 4=24 because 6 X 4 can be decomposed to 6 X 2 + 6 X 2.
Instructions:
Work with a partner. Each player takes 10 counters and places one inside each house on his or her side of the game sheet.
Once the counters have been placed, player 1 rolls the number cube (or spins) and says what the number would be when doubled. If that number house has a counter in it, the counter is moved to the centre of the game sheet in the “Last One to School” box.
If a player rolls a number that has previously been rolled and the house is empty, that player misses his or her turn.
Player 2 then rolls the number cube (or spins), doubles the number rolled, takes the counter from that numbered house, and places it in the centre of the game board. The game continues until one player has successfully moved all his or her counters from the houses and sent all the students off to school.
Where to Next?
Once students are in grade 2 the multiplication symbol is introduced. Students can also record the multiplication fact which reflects the same addition fact. E.g. 6 + 6 = 12 and 6 X 2 = 12
Playing a variety of games with doubling will help solidify this essential skill to develop multiplicative thinking.
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