The Economist have an outstanding article on teaching this week
There are some astonishing findings
40% of teachers in the OECD have never taught alongside another teacher.
Teachers in Shanghai teach 10-12 hours a week. Teachers in America teach 27!
You can read the article here.
Have a look at the bar chart describing the most effective education strategies: feedback to pupils and teaching pupils to think about how they learn best top the list. Peer tutoring is third.