An excellent assessment will demonstrate what students have learned in class.

Regularly assessing students throughout the course allows us to identify areas that need improvement. 

Asking students questions about the content assists them in reporting the information they have learned verbally, it's also helpful for other students to gage their own understanding of the content by listening to their peers discuss it. Whether the answer is right or wrong the topic is gainfully be discussed in a non-punitive environment encouraging others to join in. 

Every student is different and how they take in and process information is not a one size fits all effective approach. Tailoring instruction with multi-delivery methods to meet individual learning needs is most effective.