You probably have heard about YouTube (if not check out 5 cool things on page 10), but you probably don’t realise that YouTube can be a great educational resource. Youtube.com/edu is a must-visit site for intellectually-minded people. The site aggregates thousands of free lectures from hundreds of universities, including Ivy League schools from the US like Harvard and Yale. Students and self-starters can browse through its simple categories, from business to engineering to literature.

For instance in this video, youtube.com/watch?v=jsDVzNOeu48, Apple co-founder Steve Jobs can be seen giving a commencement address at Stanford University in 2005. The 55-year-old talks about his college life and a small business he started in a garage before it became a hugely successful technology company that produces the MacBook, iPod, iPhone and, most recently, the iPad.

While YouTube doesn’t allow users to download its videos, Kickyoutube.com and videodownloadr.com make it possible to take videos off the web and keep them on your computer for good.