Impertinence by Moonglow Classics (1996). The first part of her punishment.
From the website: (aka: Rhyme & Reason). A young lady makes up a very naughty poem about her maths master. He is furious and she is summoned to his study. She is strapped face down across a table as the first part of her punishment. She is then made to read each verse of the poem. After each one, she gets three strokes of the cane on her bare bottom. So flustered is she that she repeats a verse by mistake: and still gets the three strokes for the extra verse. Brilliant acting by two performers deep into the scenario. Moonglow (listed as C05).