A Brief History of Macbeth – A short but informative video by Director Ross Gumbley
This document (below) gives a quite detailed account of the historical context behind Macbeth. Whilst in an exam you would never have space or time to really mention these things, it is never-the-less very useful to read; it will help you understand why Shakespeare made some of his choices and also enhances your understanding of the effect on the contemporary audience.
A useful list of the 40 quotes mentioning blood in Macbeth.
Mr Bacon's GCSE English 