Bit by bit, learning how to braid her hair properly.
Some of her favourite means of using numbers.
"I wish there were advanced mathematics."
She's kill in that class.
Honestly, music could fit her. She could probably figure out some formulas for how notes go together.
Someone tells him he's good. He immediately apologises for being terrible. Must've been around Monica too much.
She could make an excuse for studying theoretical magecraft, without actually putting it into practice herself.