One thing I have tried to really focus on with my math students is partner work! Our new math series, Trailblazers, focuses a lot on working with partners and groups. Also, my classroom is made up of 17 students, 7 of special needs, so it is very important everyone works together. Our groups are carefully picked and the goal is for students to learn from each other.
Every time a partner activity is in a lesson, we review this poster by all reading it out loud and try to focus on one number (even though they are really working on all)