A power learning aid combines Coaching Calculators and Guides to help students master prime factorization, LCM and GCD.
Prime factorization :
- Prime factorization by factor trees
LCM or Least Common Multiple :
- LCM by prime factorization
- LCM by listing multiples
GCD or Greatest Common Divisor :
- GCD by prime factorization
- GCD by listing divisors
You develop understanding quickly as you work with the calculator and see each step of the process in detail.
This version contains minor bug fixes.
20/20 Fraction Basics 
School Math for Mom and Dad 
20/20 Rational Expressions 