You are permitted to collaborate with other students on the weekly lab assignments. However, you must submit your own copy of the work.
There is no point in collaborating with other students on the reading quizzes, because you will get credit just for attempting them.
You are not permitted to collaborate with anyone on the exams.
In all cases, do not copy from an existing source without giving explicit credit to that source; if you do use outside sources, clearly mark any direct quotations to indicate what you copied. Clear cases of plagiarism, where work is copied without attribution, will be given a score of 0.