Please note that the Homework Calendar has been updated to a new schedule where you will take just one quiz per day. Nearly every day in the syllabus now includes a quiz. I have tried to avoid situations in which you only have two days to prepare for a quiz on new material.
There are now just ten retake opportunities during the semester, three of which will be done in groups.
Including the 8 retake opportunities on the final, this means you have the ability to retake each quiz once, on average — although you could use those retakes to try certain quizzes multiple times if you prefer. The choice of quiz is up to you, the timing and number of opportunities follows the calendar.