## Mobius Strip Puzzles and a Mathematical Proof

Mobius strips are easy to make. Just glue one end of a strip of paper to the back side of the other end. Then you have a twisted strip. Lots of knitters make Mobius cowls as well. It’s a popular and cozy style. The author of some of the books I’ve used with students, mathematician […]

## Fraction Jacks! Or if you’re British, Fraction Stars.

A common problem educators face is to make fractions fun and intuitive, especially if their own education was lacking in this respect. One activity I developed that helps with this, and can be done with children of a variety of ages, is Fraction Jacks. What are fraction jacks? They are not the game with the […]

## Websites and Apps from NYSCATE 2013 Presentation

Here is a list of websites and apps demonstrated during my session at NYSCATE 2013. EngageNY.org: where you can download the full curriculum modules for free. commoncore.org: access Eureka, the interface for the full math curriculum modules. Number Pieces (Free): Virtual Base 10 blocks and whiteboard AL Abacus (\$1.99): Virtual abacus, sometimes called a Rekenrek […]

## Singapore Math Cheat Sheet: Starting a Child Mid-Year

A teacher recently asked me a question: “What do I do with the student who is strong enough in his math concepts, but he has no idea about Singapore Math approaches like number bonds, and he starts our school late in the year?” For her and other teachers in the same boat, I’m making this […]

## Free Printable: Money Pinch Strips

How is it possible to assess a whole classroom in a moment? One great tool for this is pinch strips. To use these, the children are asked a question, for example, “How much is \$1 minus 95¢?” The children then pinch the strips on the segment showing the correct answer – in this case, the […]