Simple!

Firstly: Get Greg to have a long talk to Mrs. Ing ao she is distracted.

Secondly Get the lighter & while Greg & Mrs. Ing are talking quietly sneak behind her a set her hair on fire.

Thirdly: Have the pencils laid out on the floor a short distance from the nearest fire extinguisher or sink.

Lastly: Drink the cans of soda while watching Mrs. Ing slip on the pencils & knock herself out on either the fire extinguisher or the sink.
Oh & don't forget to sell the other Supplies on eBay for a good profit!