Everything you need to understand or teach Wyrd Sisters by Terry Pratchett.
In Terry Pratchett's Wyrd Sisters, wicked Lord Felmet kills the king of Lancre and takes over the throne. Three witches, Granny, Nanny, and Magrat, who have secreted away the heir to the throne, must overthrow Lord Felmet by revealing the truth. They turn Lord Felmet's lie-filled play around, making the players speak the truth and freeing the kingdom for a new ruler.
When the king is assassinated at the beginning of the novel, the coven of three witches unwittingly winds up with the infant heir to the throne. Granny, Nanny and Magrat, after defeating the usurper's assassins, entrust the baby to traveling thespians. Lord Felmet, usurper of the throne, is disturbed by reports of tax-exempt witches in his kingdom. He orders tax collectors to visit the witches and collect. The taxmen, however, are no match for the witches' mother-like authority and are unable to complete their task.
Wyrd Sisters Lesson Plans contain 128 pages of teaching material, including: