Guided Practice
Most effective time for small groups that are formed based on instructional needs -- this is where students who do not have the necessary background knowledge are provided time to do so while understanding how that knowledge will help lead them to the mastery of the learning target. This is why it is so critical to clearly define how a student can demonstrate mastery.
Time for concept mapping, small group discussion with the teacher and/or peers, posing an open ended question with time to find evidence to support an answer and receive feedback with a purpose.
Time for "catch and release" -- reflecting on the target -- students should be able to describe how the learning is empowering them to master the target.