<human>: Could you distill the essence of the text into 1-3 sentences?

...shes always been an exceptional student, top of her class, in advanced courses. Struggling a little with the adjustment to middle school, which I expected. Shes already on slight restriction for her math grade dropping significantly. Shes recently started to "act dumb" with common sense stuff. This is something I see her friends doing regularly. This behavior goes along with just general behavioral issues like laziness, irresponsibility, and stupid lies that I was attributing to the coming puberty situation. 

Get an email from her teacher today telling me the signature she asked for on a bad assignment didnt look right, so she wanted to verify it was me. I told her it wasnt, and that I would handle the situation appropriately, and thanked her for informing me. 

Now I am becoming concerned that this could be the beginning of more serious behavioral issues, and want to nip the situation in the bud. Any suggestions for a punishment here? Shes already had her electronics taken away, (computer, mp3 player, video games, tv) during the week. Thinking of extending that through the weekend and 2 weeks longer in duration.

I want to get the gravity of the situation across, but I dont want to come down too hard and possibly promote more of this behavior. Gimme punishment ideas reddit.
<bot>: Generally well behaved honor students grades and behavior are slipping, she forged my name on a bad assignment, need punishment ideas.