Three meetings with DE's in a single day? That doesn't seem very likely and the whole teaching at Hogwarts bit is also extremely rushed.
I've noticed a number of spelling errors so maybe you should proofread before posting or get a beta.
Overall I do like the basic premise and style of this story and can't wait to see where it goes but it does need some polish.
Author's response
;) I know what you mean by the teaching bit, but Dumbledore had heard what he did in Hogsmead, and has no time to continue teaching himself, plus having someone with his skills will keep the students safer.
As for the spellings, ext: I've had 5 betas before now for other stories and they all let me down... only one actually did anything and that was one chapter.
well, anyway, I'm glad you like the story, and hope you keep reading, thanks.