I have not done this but have seen it talked about in other posts, so I may not be remembering it all correctly!
But it seems like the teacher gives the student a sentence strip with the two words on one end of the strip and the contraction at the other end and has the student glue a piece of macaroni where the apostrophe would go...or something like that??!!
Maybe what I read was for doing quotation marks on a sentence strip, but I guess you could adapt the idea for contractions....
Don't know if that helped or not!
