Need to cite some sources or get some writing advice? Checkout the Purdue OWL! "The Online Writing Lab (OWL) at Purdue University houses writing resources and instructional material, and we provide these as a free service of the Writing Lab at Purdue."
This site is "a web-based literacy program for boys founded by author and First National Ambassador of Young People’s Literature Jon Scieszka. Our mission is to help boys become self-motivated, lifelong readers."
On School Yourself you can get free unlimited access to math lessons and personalized assessments. The site claims it's even better than Khan Academy - you be the judge! Try it out yourself and get ahead of the curve for next year's classes!
This site is not just for math! Khan Academy now includes units on Physics, Biology, Organic Chemistry and more science and engineering topics. Review a topic, or prepare for next year's class with this awesome site.
What started out as a site for math tutorials, has now become a place where you can learn any subject on your own! Checkout the Economics & Finance videos on Khan Academy and review material, or prep for next year.