Back in the past! Somehow, Edna learned how to forge handwriting in this boring maths class. Time to find out how.

Instead of a regular inventory, he can use the lightbulb icon to 'collect' various things as conversation topics with Edna.

A way to distract Edna - she can't concentrate on forgery when focusing on maths, so try to find something that will make her want to leave.

You'll never find anything interesting in a maths class - look outside.

Collect the various fairground attractions outside as conversation topics, and talk to Edna about all of them.

Oops, I guess talking in class was a bad idea.

Still, looking at the hole in the closet reveals that there's a letter in the coat's pocket - talk to Edna about it!

Then we need to bring it out into the light.

The very same way you're able to talk to Edna in the first place - the hole in the closet door.

We need to get out of this closet and make Doctor Marcel pay for this!

Perhaps she could just... ask nicely to be let out?

If she was reminded of her dear old teacher's feelings, she might be persuaded to apologise.

'Take' Mr Hornbrush as a conversation topic, and talk to Edna about him.

We're back in the light - now we just need to learn how to forge Dad's handwriting.

Find something that Edna's dad has written on, and talk to her about it.

You'll find a note written by Edna's father in the bag under her desk.

Let's get right to abusing these newfound skills!