Good chapter. I like where this is going. Draco helping babysit - could Snape be any meaner? I also like how Snape does things as he talks, but Harry is so preoccupied with what he is saying that he does not notice what Snape is doing. That doubling seems very Slytherin to me, but it's a great way to get things done without people noticing until it's too late.

 I did notice a few typos and mistakes that broke up the rhythm of the story. I ould be happy to beta read for you if you like and give some indepth feedback. Email me at mybeautifulmane@yahoo.com.

Keep up the good work, and post soon!