An important element of student-centered, more engaged, learning is collaboration. When students interact and work with each other, they take a more active role in the classroom, which increases the potential to deepen and strengthen learning.
Avoid a Biased Rubric!!!!
Make sure you design your rubrics so you do not disadvantage students whose ideas, aesthetics, and methodologies are different from your own or the privileged norm. Account for valid subjectivity and personal expression.