I've always noticed that kids often don't know the proper use of some prepositions. So many times I hear someone say, "I'm waiting on line" which should be "I'm waiting IN line". I ask my students if they're standing on a line drawn in the road. Another expression I hear very often is, "I'm babysitting my sister." UH? Where's the preposition FOR? "I'm babysitting FOR my sister".
Not to get off the subject of prepositions, but another expression that drives me crazy is "I'm going to grow a business". Grow a business is an expression that's made its way into the English language without anyone giving it a thought. More appropriately, it might be stated.. "I'm going to create a business". When I think of the word "grow' I think of planting my vegetable seeds so they'll grow during the summer. Don't mind me, I'm just having one of those grammar days. :)
I've had many great comments about my North Pole Prepositions since I CREATED the packet. (Notice I didn't say "... since I GREW my North Pole Prepositions packet :) Kids have to guess which prepositions fit correctly in the sentences and then draw pictures of them. Their illustrations are so cute and funny!