That’s the title of the book by Barkley, Cross and Major, a copy of which I purchased a few months ago.
The authors distinguish ca. 30 Collaborative Learning Techniques, or CoLTS for short, and divide them into five categories. Here is a nice list of them all to help jog your (and my) memory later, should there be a need for that:
I. CoLTS for Discussion
- Think-Pair-Share
 - Round Robin
 - Buzz Groups
 - Talking Chips
 - Three-Step Interview
 - Critical Debate
 
2. CoLTS for Reciprocal Teaching
- Note-Taking Pairs
 - Learning Cell
 - Fishbowl
 - Role Play
 - Jigsaw
 - Test-Taking Teams
 
3. CoLTS for Problem Solving
- Think-Aloud Problem Solving (TAPPS)
 - Send-A-Problem
 - Case Study
 - Structured Problem Solving
 - Analytic Teams
 - Group Investigation
 
4. CoLTS Using Graphic Information Organizers
- Affinity Grouping
 - Group Grid
 - Team Matrix
 - Sequence Chains
 - Word Webs
 
5. CoLTS Focusing on Writing
- Dialogue Journals
 - Round Table
 - Dyadic Essays
 - Peer Editing
 - Collaborative Writing
 - Team Anthologies
 - Paper Seminar