How does the class time in the day and week impacts the students' learning outcome? Is there any research/study/survey that looked at the class time in the day and week impacts the students' learning outcome? E.g. students often complain when class are too early in the morning, students on Monday might be more rested than on Friday, etc.; I wonder whether there exist any significant impact on how well students understand and remember the class materials.
I came across the following study:


  T McElroy, L Mosteller
  The influence of circadian type, time of day and class difficulty on students' grades.
  http://vjbennett.pbworks.com/f/circadian+rhythms.pdf


In the conclusions of the work, they mention that the students have a best performance if their optimal time-of-day (i.e., if they are monrningness type or eveniningness type) coincide with the class schedule. By contrast the classes that require less cognitive functioning are less sensitive to the advantage and disadvantage of optimal and non-optimal time-of-day.