Roy Richard Sawyer is currently living in Arizona.

He obtained a Master´s Degree in biology from a foreign University, where he specialized in neuropsychology. He also has a degree in Computer Science from BMCC, which he attained after moving to the States.

Since then, Roy has been working as a software quality engineer and web developer for a company in Florida. He has more than ten years of teaching experience and a long-standing interest in new computer technologies, psychology, and brain physiology. When he has some time to relax, Roy enjoys swimming in the ocean off the Florida coast or going for walks with his dog on Window Rock trail. He also enjoys traveling, particularly in the USA

. You can contact Roy at tutor@hardstuffez.com

So far, he created exercises for Algebra. And exercises for Chemistry

You must sign in to take these quizes. They are free for now.

The first link is for a eBook, the second link is for a paperback.

The Easiest Way to Understand Algebra: Algebra equations with answers and solutions

The Easiest Way to Understand Algebra: Algebra equations with answers and solutions

This Algebra tutorial helps you to understand how to solve different types of algebra equations. It includes 80 equations with answers, solutions and with explanation for each algebraic problem.

Geometry for Students and Parents: Geometry problems and solutions

If you are a parent struggling to help your child with geometry homework, this is a short book that will help you. It covers plane geometry and touches on beginning trigonometry. You will find 70 illustrations and 25 problems with detailed solutions. Whether you are new to geometry or just need to brush up on the things you learned in school, this is the book for you. Give your child the gift of learning along with you. This book can be useful for students as well.