One of my favorite structures to use is RallyCoach. To use this strategy your students need to be in partners. I have used a threesome in a pinch, but partners really are ideal.
Partner A starts seated and works the first problem while Partner B stands behind them where they can see their work. As they are working they "talk out" their thinking so that Partner B can hear them. When they finish the problem Partner B either praises their correct solution or helps Partner A to find the correct solution. Then, they switch roles and repeat the process until all problems are solved.
I really love this structure because it puts the students' in the role of teacher. They really take ownership of helping their partner to be successful.
As a helpful tip, I have the partners use two different colors so that I can tell exactly who did what. Additionally, students also love this structure because they recognize that they only have to do half of the problems each. Win-win!