National tests and exams require no more than an acquaintance with extracts and snippets.
Mr Farrell will have none of it. He expects even his lower-ability pupils to study whole books and is prepared to risk their grades and his reputation. But other teachers, pressed for time and eyeing their results, are understandably less bold. Why cajole an unwilling class into reading the whole of Romeo and Juliet when it will make little or no difference to the marks by which their education is measured? Why bother with a whole book when half of one will do?
The dangerous message is that books are about grammar, technique and getting the answer right, rather than reading for pleasure. In the 1980s, traditionalists worried that teachers had too much freedom to teach what they chose and that classic authors were being marginalised in favour of more fashionable alternatives. Chuck Berry's autobiography featured on one exam board's list. Now we are worrying that pupils are not reading any books at all.
A balance can be struck. Teachers need more time and leeway to teach the books that they enjoy. In Wales, the abolition of key stage tests should help. Most secondary schools have decided to take the optional KS3 papers available up until next year. But, if they can wean themselves off this dependency, their 14-year-olds might then have more time to read a book they like - in or out of the literary canon - rather than cramming in snippets for which they and their teachers have little enthusiasm.
Teaching English in the age of email and text messages is a challenge.
English teachers, as Mr Farrell shows, can rise to it but they need encouragement.