One way to start a new year (calendar or school), semester or chapter is to make a commitment and concerted effort to try something new. If you have not used teams consistently, make a commitment to do so. If you have not used team roles, try them. If you have not used a study team strategy, try one.
An easy place to start is with Reciprocal Teaching. Have each student find a partner (it could be their elbow partner or someone from another team). One member of each pair pretends that the other was absent and explains something that they learned today. Then have the partners switch roles. This is great for vocabulary review. When teaching someone else, students are able to consolidate their thinking.
You have established good classroom norms from the very beginning, but you must continue to revisit them throughout the year. Remember:
S Start promptly.
P Peer support expected within each team.
A Assignments due each day.
R Respond to teams rather than individuals.
C Circulate. Circulate. Circulate.