Any sequential course like a new language requires quite a bit of retention over those summer months in order to begin the new school year at the right starting point when you move on to the next level. It can be quite a drag to start the new year drudging
through old material in "review-mode" for too long if you have forgotten too much of what you learned. Practice...
I have found great success in using word puzzles, namely Tarsia-style puzzles, to review previously learned material. These puzzles are great for vocabulary and expressions. They are quick tools for review presented as a matching game, using either translations
or definitions of words. I have let students work on them alone, in pairs, or in small groups, and after they get the hang of it, they...