Multiplication Subitizing Cards
I’ve asked myself the following questions:
- When do students practice multiplication that’s not written as AxB? (for the purpose of automaticity)
- When/how is multiplicative reasoning fostered?
- When do multiplication strategies become automatized?
- When do number strategies become number knowledge?
My answer to all 4 questions….I use multiplication subitizing cards with my daughter whose in 2nd grade so I figured I’d videotape and share.
My takeaways:
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- It’s easy to identify which facts she’s comfortable with and has automatized.
- At 1:15– she demonstrates how she used multiplicative thinking for 6×6.
- At 2:00- she could use her understanding of the commutative property for multiplication to build fluency. She was quickly is able to recognize that 7×5=35 at 1 minute, but it took some time to figure out 5×7. She owns this strategy for addition so I’m waiting for it to click with multiplication….no rush:-)
- At 2:20– I missed a fact when she was wrong (doh!)
- At 2:48 and 3:55 she explains her multiplicative reasoning.
Five minutes spent purposefully building fluency and I gained so much information about my daughter. The great thing is that it works for every 8 year old…even the ones in your school.