Producing the play from the (mostly) finished script (three or four weeks)
Plan production's look.
There will already have been a vague idea of a set, costumes, props. It's time to let committees or responsible volunteers make decisions within parameters you set (budget, time), and set deadlines. See Bag of tricks, sets. Decide how the cast will check up on the deadlines.

Photocopy final scripts.
Even if you have to leave blanks where an unwritten scene or two must be inserted later, it's important to have a bound copy to rehearse from. Use brads or a three-ring binder, not a stapler -- you can count on pages being inserted or removed. Read through the script from start to finish, as if you were all seeing it for the first time.

Rehearse every day until the show.
One act a day is pretty good at first; You should pick up speed. You have a head start, because the kids are performing their own lines that they've improvised and acted out many times. You will have to work most on what transitions from one scene to the other, and getting students to enunciate and project towards the audience.

Aim to run through whole acts without interruption, saving notes for the end.

After the Performance: Follow up.
See details