If you've been feeling rusty on your math skills, this Number Review and Skill Refresher topic is the perfect place to start. In this series of lessons, high school Algebra students will review key topics such as repeating decimals and fractions, inequalities on a number line, numbers and estimates, and scientific notation. By the end of these lessons, you will feel more confident in your understanding of these fundamental concepts and will be better prepared to tackle more complex problems in Algebra.