Welcome! We're so glad you're here. Looking for high school and early college math? Want to truly understand what you're doing? You've come to the right place.
Start with arithmetic. Proceed stepbyguidedstep through Algebra, Geometry, Precalculus, more. Or, jump to just what you need. Quick explanations or full text—your choice.
You'll never run out of practice. There are unlimited exercises and worksheets for every lesson—all randomlygenerated, all with solutions. Practice online or offline. Time yourself.
All free. Highlycredentialed author. Stateoftheart mathematics display. Watch this 5minute video for a quick start. Have fun looking around!
Carol writes the lessons and creates the exercises. This web site has given meaning to her life since 1999—about 11,000 hours.
She has a Doctor of Arts in Mathematics (a doctorallevel degree that emphasizes effective teaching), and has taught for about 30 years at both the college and high school levels.
FUN FACTS 
Get to know me! I think it's more fun to learn from someone you know. How old am I? Do I have any kids? What's my favorite number? Do I play pingpong? 
ALGEBRA PINBALL 
You can time yourself on a lot of my exercises. I remember watching my students at Miss Hall's School trying to beat a really fast time—their fingers were flying! It made me think of someone using a pinball machine, and thus was born ‘Algebra Pinball’. 
LANGUAGE OF MATH 
This is the book that started my entire web site. BrooksCole publishers loved it. They said: “If you can find the right place to put it, this book will do a great service to the mathematical educational world.” 
MAINTABLE OF CONTENTS 

NUMBER LINE POPULATION 
Take up residence in my own onedimensional world. 