Assessment of course programs is so essential! Carefully assessing what works and what doesn't is vital to creating the most optimal learning environment. Mcnulty et. al (2014) noted the importance of formative evaluation of quizzes for course programs.
Reference
McNulty, J. A., Espiritu, B. R., Hoyt, A. E., Ensminger, D. C., & Chandrasekhar, A. J. (2014). Associations between formative practice quizzes and summative examination outcomes in a medical anatomy course. Anat Sci Educ. doi: 10.1002/ase.1442. [Epub ahead of print]