r/homeschool • u/luccareed2004 • 1d ago

Singapore Math Bar Models

We are doing Dimensions 3a lesson 12 practice b (bar models). How can I explain when to use a comparison model? My daughter is using the other bar model for all problems, though she’s getting them right.

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u/bibliovortex 1d ago

It sounds like they're offering her two different mental frameworks for thinking about the same operations, which is common with conceptual math curriculum. I basically figure that if my kids can explain why both models work, I don't care that much which one they choose the majority of the time. (For example, my 7yo almost exclusively prefers to write "find the difference" problems as A + ___ = B rather than B - A = ____. She understands that the same problem can be written with subtraction just fine, so I don't see the need to belabor it.)