There are only 4 rules in my classroom. The four rules are 1) Be respectful - I will always talk to students respectfully so there is no reason for students to talk to either myself of their peers with disrepect. 2) Always sit in your assigned seat - seating assignments are always projected in the front of the room so there is no reason to be confused about where to sit. No negotiations. 3) No talking during independent time - this doesn't need much explanation. 4) Technology is used for learning. Their devices should only be used to watch instructional videos otherwise it's too easy to get sucked into the vast abyss of the internet.
By allowing my students to assess other students' work and then providing them with a Student Lab Development Rubric to evaluate their own work, they learn to design and refine high-quality experimental procedures. The Student Lab Development Rubric is one of the tools I use to help students build the experiments they've created and then display results and lab analyses. When students are the ones dictating how they will conduct their experiments, they invest more fully in the activity and come to realize that science involves constant critical analysis and reiteration. I like to move conversations away from "right" and "wrong" and more towards how we can improve each component of our lab activities. Initially, some students feel uncomfortable identifying that their work isn't up to the high standards of the rubric, but over time most come to realize that this process helps them improve their final products and understand the underlying purpose behind labs.
The class pace is always posted at the front of the room, including the lesson that should be completed by the end of class as well as the following class. The class pace serves as a benchmark for students, letting them know how many lessons they should have completed by a certain date. The grading system I use is primarily based on student progress, so for students to get a good grade on their progress reports, its essential that they keep with the pace of the class. This is essentially a guide for students to use as they go through standards at their own pace.
At the end of any collaborative activity, each student makes a copy of this Teamwork Evaluation Rubric and fills out the boxes with his/her thoughts on the overall quality of their group's teamwork. The rubric includes multiple indicators of high-quality teamwork and encoruages discussion about how to improve future iterations. Indicators include noise level (framed as concern for other group's ability to work effectively), quality of work produced, overall teamwork, and level of grit. Students assess their own contributions to their collaborative assignment as well as their teammates' contributions. Students can insert glows and grows where they explicitly discuss their feelings regarding their own work and the work of their peers. I frame this activity as a team-building exercise. Evaluating collaborative assignments can be complicated. The Teamwork Evaluation Rubric allows me to collect a good deal of data about individual student's contributions from multiple perspectives, which is both a fair and thorough way to assess individuals and the team as a whole.