Thumbs Up
ask students to give a thumbs up, a sideways thumb, or a thumbs down to indicate fully understand, mostly understand, or need help. Or use a five-finger scale and have students hold up the number of fingers that corresponds to their level of understanding.
Traffic lights/cards
can be used while students are engaged in a task to indicate their progress.
Mini white boards
 students should cover their answers once they have written them and raise their boards on the agreed command simultaneously.
Exit ticket ​​​​​​​
A question that is posed to all students prior to class ending. Students write their answer on a card or piece of paper and hand it in as they exit.
Learning Journal 
Students write their reflections on a lesson, such as what they learned, what caused them difficulty, strategies they found helpful, or other lesson-related topics.
Diagnostic question
One right answer, three wrong answers, and each of the wrong answers reveals a specific misconception.
Classroom pool
allows to quickly ask a question and instantly receive responses from students during class. 
Providing feedback that moves learning forward