This link will get you to the on line textbook.
Purplemath's lessons are written with the student in mind. You will find lessons that emphasize the practicalities rather than the technicalities, demonstrating dependable techniques, warning of likely "trick" questions, and pointing out common mistakes. The lessons are cross-referenced to help you find related material, and a "Search free lessons" link is provided above the article title on every page to help you find what you're looking for..
Sophia.org is a website that believe in helpings everyone be better prepared to succeed academically. Whether you are a middle school, high school or adult student, we connect you with great tools so you can achieve your educational goals. You do not need to subscribe to their site to use it, just type in the concept you need to explore.
Khan Academy is a tutorial site for any math concept you need to explore.