My secondary school dealt with the prize issue by tying it to the end of year exam results for each year : Highest mark in each subject won a prize, which was a voucher to be spent on suitable book(s) at Sherrat and Hughes bookshop.
The music department fiddled the system in my final year - I had been one of the three people who had taken music to A-level, and it was in fact the first A-level set for a while and the first where there was a good chance of all students passing (rather than the more usual No chance of anyone passing - the school's ethos was a sporting and science school). Somehow, it was contrived that there happenned to be three prizes, in either music or a vague arts and culture area and all three of us went off to Sherrat and Hughes with our vouchers to purchase the books for the speach day end of year.
I confess to some mischief. As required I spend the vouchers on what was regarded as proper litterature or accedmic titles, and I chose three books: Bede's "History of the English Church and People", Thackeray's "Vanity Fair" and"The Satiricon" by Petroneous in a recent translation from the Latin., and asked for the dedication sticker to go in the Bede.
The Satiricon is, in fact , a "Dirty Book", and I did enjoy some rather "Private" moments thanks to the description of the orgy about a third of the way into the book. But,as a book from the Latin writing "Classical" civilisation it rather sneaked in under the radar of the censor.