"caffolding Culture
How are you building a culture of collaboration in your classroom? Teachers should not forget the importance of scaffolding the skills needed for students to work in groups. Paired with a good collaboration rubric, where students know what is expected of them in terms of behavior, teachers need to scaffold skills such consensus building, effective communication, and the ability to critique. Educators need to explicitly teach and assess collaboration, a critical 21st century skill, if they want their group work to be productive."
This is a series of slides from a great speaker, this time focusing on Social Studies. He's the guy who invented that video we've all seen called Shift Happens. Highly recommend this one.
As soon as you make the task more difficult or move the learning expectation to a higher and more advanced level, you have changed the standard and altered the goal.