"This isn't funny at all, Mrs. Lupin."
Well, the students certainly thought it was worth a good laugh. A combined group of 7th years, Hufflepuff and Gryffindor. Just because they were in their final year did not mean they were mature.
Tonks just smiled. This lesson was going exceedingly well. This was one that Professor McGonagall needed to see. 32 students, wands pointed at the classroom door, all unified in one of the most useful and practical spells ever to be created. Was it so wrong that the students express joy in what they did? After all, they deserved it! By golly, they deserved it.
"Mrs. Lupin, I insist you open the door now!"
Was it so wrong to keep the cooperating professor out of the room? After all, Tonks had reached the point where a little solo-teaching without even the presence of Professor Snape was necessary.
The kids were laughing harder, now. Well, as long as it didn't interfer in the spell. Many spells could blast away a locked door, but keeping a door locked... that was tricky.
She was going to have to record this. They were all doing marvelously.
"I'm sorry, Severus!" she called. "I just can't seem to find the key!"
"I am insulted that I be locked out of my own classroom!"
"The students overpowered me!"
More giggling. She winked at the bunch of them. Special class treat was long overdue.
Just something we joke about. The cooperating teachers are supposed to leave you all by yourself for a few weeks-- we always want to lock them out.