All details on how to attempt lab quizzes are provided via the announcements, please check them regularly.
There are usually 3 lab quizzes, scheduled in weeks 4, 7 and 11 (TBC, check the announcement for full details). The topics covered do not overlap, and usually covers the topics from lectures and labs scheduled up to the lab quiz week (i.e., weeks 1-3 for lab quiz 1, weeks 4-6 for lab quiz 2 etc.). More details about the covered topics will be described in the announcement.
Rubrics for each lab quiz are provided in the lab quiz sheet.