Link to Khan Academy: Khan Academy Math Lessons and Resources
Khan Academy provides lessons and resources for many levels of mathematics including Pre-Algebra and Algebra. These lessons and assessments can be used by students needing to review different topics in Math 8 or wishing to look ahead at what they will be learning later in 8th grade and also in high school. These are a great resource to all students.
Once you have navigated to the Khan Academy Website, you can search a topic. Most lessons are in video format and some are written. Each topic also has user friendly self assessments so the user can check for understanding.