Banana Slush Punch

I originally had this recipe at a school dinner. My students made it for the annual parent dinner, it's delicious, but needs to be made ahead of time - you can't just throw this one together.

Recipe From: There are lots of variations out there, but this one seems to be the one I know. 

Rating: tasty, hard to stop drinking it

Notes:

• As the recipe says, this can be stored in the freezer for up to 3 months.
• Could probably be easily tweaked to include the "adult" portion of a slush drink.