What I love most about this is that all you need is a packet of test prep questions for each set of partners. I have been using resources from Green Apple Resources as well as multi-step problems from my own store as the questions.
The rules are simple:
You work collaboratively with your partner to solve the problems in the packet. I use the phrase, "No hogs and no logs," to encourage students to share the work. Each problem that you solve with your partner correctly earns you 2 points. Each problem that I help you and your partner to solve you get 1 point. Each incorrect problem earns you a goose egg.
I have found that having a question that they are helped on still earn points encourages students to ask me questions because they would rather get one point than none at all.
In the end, I tally up all the points earned by each partnership and the partners with the most points win bragging rights. Sometimes I throw in a little prize, but not always.
This has been a great strategy for test prep that has worked wonders in both reading and math practice!