Oswego City School District
Regents Exam Prep Center: Rational (Fractional) Expressions
A wealth of resources to help you in planning classroom instruction on rational expressions: lesson plans offer guidelines for and examples of simplifying, adding and subtracting, multiplying and dividing rational expressions; practice...
Oswego City School District
Regents Exam Prep Center: Counting Principle
The counting principle is even easier to understand after reading this tutorial. There are practice problems and a teacher resource page included.