It’s difficult to make an assessment though because the simple offence doesn’t tell us much. What, exactly, did the “impatience” amount to for example?
“Striking the headmistress”? If I’d have done that I dread to think what I’d have got. What did “forging letter from parents” attract? A friend of mine got six strokes for that when she wrote her own note to explain her absence. She would probably have only got half of that for the truancy she tried to cover up.