Contributed by
Vijay Fafat
This is a humorous book about A J Wentworth, school master at a British school, who teaches Algebra to 1113 year old children. The entire novel has a touch of Wodehouse to it as it follows the bumbling but sincere actions and reactions in the life of Wentworth, his dealings with cocky, impudent students and in the latter half of the book, his army life during WW II. A lighthearted novel but without any intricacies or convoluted plot of a Wodehouse. Could have been developed much more than the author ventured.
Math references are scattered throughout the book due to his profession but some are particularly funny and outstanding. At one point, he ends up throwing the algebra text (Hall and Knight) at a sleeping student. Students complain about the fact that in one lecture, they have to expand (a+b)(ab) to a^2  b^2 and in another lecture, refactorize it to (a+b)(ab) ("can't we jolly well make up our minds which is best and leave it well alone, sir?"). The most hilarious one is the exchange about Pythagoras theorem:
(quoted from The Papers of A.J. Wentworth, B.A.)
Wentworth: This morning, we are going to prove that the square on the hypotenuse of a rightangled triangle is equal to the sum of the squares on the other two sides.
Student (Mason): Is that likely to happen? I mean, is a rightangled triangle likely to have a square on its hypotenuse?
Wentworth: I'm afraid I don't quite follow you, Mason. If I draw a rightangled triangle on the board and then draw a square on the side opposite the right angle, it has got a square on its hypotenuse. The question whether it is LIKELY to have such a square does not arise.
Mason: Not on the board, sir, no. But I mean in real life. I mean if reallife triangles don't have squares on their hypotenuses there wouldn't be much point in proving that they are equal to whatever it is they are equal to, would it?" (the "it" gets corrected by another student).
Student (Hillman): "I see what Mason means, sir. I mean it would be a pretty good fluke if a triangle had squares on all its three sides at once, wouldn't it, sir?"

The book had a TV appearance in "Curtain Call" in 1952.
Note that there was also The Papers of A J Wentworth, B.A. (Retd) (1962).
This was a sequel to the "The Papers of A J Wentworth, B.A.". Most of this book is about the retired life and smalltown incidents in which Wentworth is caught up but in the last 20% of the novel, he heads back to his old school for a stint and ends up teaching algebra to the next generation (including his former student, Mason's son). One of the funnier ones:
(quoted from The Papers of A.J. Wentworth, B.A.)
Wentworth: Required to prove that the exterior angle of a triangle is equal to the sum of the two interior opposite angles.
Potter: I don't understand how a triangle can have an exterior angle, sir.
[...]
Wentworth: [...] If I produce BC to any point D, will you not agree that I have made an angle ACD which may be fairly called an exterior angle?
Mason Jr: But it isn't a triangle any longer! It's more of a cornerflag lying on its side.

