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Usage: I have used Lymboo Math, for which I have a free subscription during the school year. I would definitely switch because myBlee Math better matches my Singapore curriculum. I like the virtual manipulatives and other pictorial representations of match problems that better support conceptual understanding.
Strengths: It provides good pictorial models of math problems. Great for increasing conceptual understanding. Model use is an area of weakness with our students so it would provide more opportunities for students to work with models in an engaging way.