Misspellings on the classroom blackboard: (1) "BAROKE" (Baroque), (2) "LITERACHURE" (literature), (3) "BOOK REPPORTS" (book reports), (4) "DEAF LEOPARD" (a correct spelling but not when it's the name of the rock band Def Leppard) (5) "MILTEN LOST REGANED" with a pair of dice drawn in as a rebus (John Milton's Paradise Lost and Paradise Regained).
In the last scene (set in Barth's Burgery), Alasdair performs an homage to Oliver Twist by Charles Dickens, begging for a second helping.