# Featured

## Divisibility Rules: 2, 3, 4, 5, 6, 7, 9, 10,11,13 and higher primes

Posted on February 2nd, 2019 by kramer

After the children became factor masters last week, we introduced a set of divisibility rules for the numbers 2, 3, 5, 6, 9, and 10 for the younger children since these rules are easy to learn and apply to any number. See these rules below:

## Factor Pairs Method--Inverse Variation

Posted on January 26th, 2019 by kramer

Last week we learned about free fall and Newton’s equation:

## FREE FALL ACCELERATION DUE TO GRAVITY—Aristotle to Galileo to Newton (F = M x A)

Posted on January 18th, 2019 by kramer

Want to see an object accelerate?

## Aerodynamics--4 forces--Nakamura Lock, Phoenix, Balcony Bomber

Posted on January 12th, 2019 by kramer

**What Is Aerodynamics?**

## Kramer Rocket Construction with Right Isosceles Triangles

Posted on January 5th, 2019 by kramer

I had the children draw their favorite triangles. I loved the diversity of triangles created by the children: acute, obtuse, and right triangles; scalene, isosceles and equilateral triangles. I told the Mathletes that my favorite is the isosceles right triangle otherwise known as a 45-45-90 triangle.