It's literally impossible to perform the activity as specified in this lesson plan (in a normal classroom environment). Inserting your hand will cause some expo

It's literally impossible to perform the activity as specified in this lesson plan (in a normal classroom environment). Inserting your hand will cause some exposure of the inside of the bag to air. Also: "Heresy kisses" -- Nice proofreading. Damn good thing this lesson plan isn't meant for students to view directly. Is it too much to ask for commercially-supplied teaching tools to go through a basic quality control process?