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This is an introduction to the math support program at Eleanor Roosevelt Community Learning Center. ERCLC is a California Charter School supportin...

A moving sidewalk, such as in airports, is a physics experience waiting to happen. Check out this exercise in relative motion.

This is the method introduced in the Klutz Book of Knots. It is a "double" knot that still comes untied by pulling the ends. It is a bowed versio...

Tying your shoes looks like a simple thing, but probably half the population uses a knot that is guaranteed to come loose several times per day. T...

Eleanor Roosevelt Community Learning Center (ERCLC) is a charter school serving homeschooling families. From time to time I teach a class at ERCL...

The rules for multiplying positive and negative numbers may be hard to understand, at first. In particular, many people wonder why a negative time...

This does not cover the conceptual side of understanding fractions. It gives a good, clean method to carry out the operation easily and correctly....

This is how they should be teaching it in school. They used to teach it this way in the US. They still do teach it this way in some other countries.