I use these little puzzles all the time to help my kids practice their Spanish vocabulary, but it can be used in almost any class if you get creative using synonyms and main ideas with vocabulary words.
For my kids, I put a Spanish vocabulary word on one side of the line and an English vocabulary word on the other side of the line. If you teach math, you could put the equation on one side of the line and the answer on the other side of the line. For chemistry you could put the scientific abbreviation of an element on one side and the name spelled out on the other side... I think you see how this works!
I try to have these typed, printed and cut out before the kids get to class and I store them in zip lock baggies so none of the pieces go missing.
This activity can be used at any time during the chapter and can be used individually or in small groups.
Enjoy and feel free to leave constructive feedback or share how you are using this product in your classroom!