Have you ever tried to add or subtract fractions that have different denominators? It’s tricky, right? Join Ms. Susanna Post in this lesson to learn how to solve these types of challenging problems!

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Use visual fraction models to add and subtract fractions with the same denominators. Use visual fraction models to add and subtract fractions with the same denominators. Notice patterns in the ...

I enjoyed reading your recent discussion with Alex Baron, “How Much Autonomy Should Teachers Have Over Instructional Materials? ” In particular, I was struck by your skepticism about whether ...

"Web 2.0 has the potential to change the way we learn and teach mathematics not unlike what Apple Computer did back in 1984 with their launch of the Macintosh, which changed the way everyone uses ...

My last column introduced the concepts underlying BCD (binary-coded-decimal) representations. In particular, we considered unsigned versus 10s-complement versions of BCD numbers. In this column we are ...