Using any problem you would like, display the problem so that everyone can see it. Give everyone some think time where they are NOT writing anything down.
Students write their answers secretly.
Then, each student hides their answer so that others can not see it.
Once everyone has completed the problem and has their own answer, students show their answer to each other. If they all have the same answer they erase to show that they agree and are ready. If they do not have the same answer then they must work out the problem together until they do have the same answer.
Once all of the boards have been erased to show they agree on an answer the teacher calls on a random student to answer the question.
This is another strategy that puts each student in the teacher's seat because they have to explain how they go their answer to their team when they disagree. I truly believe that if you teach someone else how to do something then you understand it yourself. This strategy is perfect for that very reason.