If you are wondering what a logic puzzle is, it is a puzzle where you use clues, a grid, and some deductive reasoning to figure out who matches with what, or what items go together. It is a great way to exercise your students' brains!Here is my blog post about the benefits of logic puzzles!
Routine: If a student finishes classwork/group work early or even comes in early at the beginning of class/end of recess. I would implement puzzles as a routine after finishing work. These puzzles have always felt like small games to me. It keeps students challenged, exercising different aspects of critical thinking, but can help maintain a classroom where students are still doing quiet, individual work.