This week I learnt about the Khan Academy; a free online learning school covering a variety of topics. It was created back in 2006 by Salman Khan and was developed following a couple of years of using online tools to tutor his cousin in mathematics.
A meme is an idea, behaviour or style that spreads from person to person within a culture. While genes transmit biological information, memes are said to transmit ideas and belief information. (Wikipedia definition)