One of several great posts by Oliver about using the collaborative opportunities from Google Docs etc to change the way pupils work. In this case, how they assess and improve their work.
SOLO, which stands for Structure of Observed Learning Outcome, provides a systematic way of describing how a learner's performance grows in complexity when mastering many tasks.
Suggested by @dougbelshaw as more relevant to 21st C schools than Bloom.
I love this site as it's a fantastic way to get the kids applying their mathematical knowledge. The Leaderboard introduces an element of competition and the problems change each time the game is played so pupils cant just learn the answers. If you set up a class account you can keep track of what the pupils have attempted and how well they did - so you can target problems straight away.
This was on TES forums - product of a tweet - This mnemonic helps students to improve their writing by varying the way they begin sentences, varying punctuation, and using relative pronouns. It also helps to reduce overuse of compound sentences. More commonly known as A CRAPPIE among the students, it can be effective in any subject, not just English.