These Science ebooks are available through the learning express website. You will want to purchase lab books or join a co-op with lab classes to use in addition to this curriculum.
Biology Success in 20 Minutes a Day
Chemistry Success in 20 Minutes a Day
In addition to these science ebooks, you will also find books on reading skills, writing skills, math, standardized tests, military tests and more. You can purchase the actual books, plus the physics and earth science volume at Amazon.com.