Writing Folders as a possible Common Formative Assessment then break into small groups.
Here's a peek at the Chapters in this book:
Chapter 1- Why Educational Achievement Matters
Chapter 2- The Case for Formative Assessment
Chapter 3- Clarifying, Sharing, and Understanding Learning Intentions and success Criteria
Chapter 4- Eliciting Evidence of Learners' Achievement
Chapter 5- Providing Feedback that Moves Learning Forward
Chapter 6- Activating Students as Instructional resources for One Another
Chapter 7- Activating Students as Owners of Their Own Learning
Here's a quick video clip by Dylan Wiliam--author of Embedded Formative Assessment
"Dylan Wiliam stresses the importance of formative assessment as a key process for increasing teacher quality while having the biggest impact on student outcomes. He looks at some of the popular initiatives that aim to increase student achievement, such as learning styles, and presents research that shows formative assessment practices have a much greater impact on educational achievement than most other reforms."