If you haven’t noticed, I have included a few “Helpful Links” on the site. One of those links is to the Khan Academy, whose goal is to provide “a free, world-class education for anyone everywhere.” I recommend Khan Academy to my students looking for extra work in math (other categories tend to be higher level – math begins at basic arithmetic). Whether you are struggling or excelling, Khan Academy is a great place to practice skills and push yourself to a higher level of understanding.
It’s very simple. You choose a category, watch a tutorial video, and practice problems until you prove your proficiency in that area. To learn more about how it works, feel free to watch Salman Khan explain Khan Academy at TED 2011.