GOOD DEAL is more like довольно большое количество, сумма, объём. Not just много. It's a personal subjective expression of a rather large number. Hard to explain, but maybe there's a corresponding Russian form that's equally evasive)))

довольно многому

My baby!

😘

I've deleted my translation, but I should say that the phrase "Тебе довольно многому нужно учиться" на русском не звучит. We say just "многому".

There must be some way to render the meaning of this phrase.

Тебе есть чему поучиться. But I think it's less than good deal.

Good deal also means significant amount, if that helps.

Uly, what's the English for шпаргалка? cheat sheet?

then just много)

Тебе ещё учиться и учиться)