This came from a workbook bought by the kids’ grandparents.

Can someone please explain the purpose of the jars of bugs here?

The mathematics I encounter in classrooms

This came from a workbook bought by the kids’ grandparents.

Can someone please explain the purpose of the jars of bugs here?

Posted in Diagrams and decorations

Tagged insects, jars, numbers, numeration, place value

A former calculus student who is tutoring in a local elementary school stopped by to ask about how and why decimal points work in the lattice algorithm for multi digit multiplication. Here’s the residue of our conversation.

A student submission in response to the question, “Can a hexagon be equiangular, yet have no two sides congruent?” This is presently an A Assignment in my math for elementary teachers course, and is still open (although this diagram purports to resolve it with a counter example).

A College Algebra student wondered whether there could be a function such that its inverse is the same as its opposite. That is, can there be an *f* such that ?

I had to work graphically to think this through, which you see above.

That task is now an A Assignment.