Star Nun: "Do you understand."
Duckling on the Chair: "Yes, I do. This is boring. Let us talk about the Planck–Einstein equation, for a real challenge."

Now that I'm looking at this, the school part of monastery seems really has some high standards. Physics at that age? Really?

I mean - let's consider the following.

We now know how old the characters are (at least the ones currently at convent). We also know that Froggy (8) was one of the last to join, with only Sheepy coming after her. We also know that half of the "little nuns" (Clumsy, Spicy and Glasses) are 11, while Bunny, the youngest of adult nuns, is 20. There's a flashback image, where Bunny celebrates (unhappilly, but that's not important here) her 15th birthday. Froggy is in that image, which means she'd be 3 there. Clumsy is also there, which means she'd be 6 there.

And with this image focuses on Glasses joining (and considering she arrived before Froggy) - this means that the three of them (Clumsy, Spicy and Glasses) are barely 6, maybe younger. What school teaches 6 year old kids physics? (Even if we consider Spicy a genius, it still doesn't make much sense!)