Answer:
pair the best groups of 2 with the worst groups of 2
Step-by-step explanation:
Based on the information provided within the question it can be said that the one tactic that can be done to make this go smoothly would be to pair the best groups of 2 with the worst groups of 2. That way the best groups can help the worst groups and hopefully bring up their scores while also practicing their cooperation skills. This is a widely used tactic because it gives each individual within the group tasks to keep them busy and challenged.