being myself an instructor for the past 6 years, the 1st thing i would give you as an advice would be to sit with all the kid and tell em to shout their name out loud, so everyone in you little group know with who they'll work all the winter, friendship between those lil kids it the 1st thing to get done.
always start you lesson by a little run, like a catch me i you can between a 2m (square) area, just to get em hotter, if a kid cry about leaving is mother, just tell him that she is waiting him up the hill... he'll get up the hill and down the hill as long as you tell him his mom is at the opposite.
TEACH KID how to carry their skis, as to clip their boots on the ski ALONE OR with the help or his new friend, should be done within 4-6 weeks. 
learn 'em how to get straight on their skis, at least the novice position, which is to get their hands on their knees with the head looking far in front of him.
ask their parents the first class if they got any allergic situation, if yes forgot the candy, and as one nser already says, STICKERS is nice way to gift em for a nice lessons.
ALWAYS REMEMBER THEY'RE NOT BODE MILLER AND NEVER THEY'LL BE, tell the parents the first lesson that you're gonna : improve his kid the most he can and will, but he'll never be as good as what you want him to be. 
if you still have questions you can msg me thru the ns mail, i,ll be glad to give you more info about what you can teach em as low lvl, as well as higher lvl