As for the management, unlike the kids, they are unlikely to be persuaded into behaving with the promise of some 200¥ candy on Fridays lol. I would try not to ask too much of them early on, but as you prove to them you are there to stay they will be more receptive to your feedback.

BenAllenG

BooksAndArticles

My First Day Teaching English Abroad at a Preschool. It was sort of a Disaster. 

speakingyourtruth

If you are given the freedom to design the lessons yourself my recommendation is to give everything an associated game. You don't need to play them every day but preschoolers will do anything to play a game lol