Can't one just write new assignments each year? Of course the students will share the answers. These ones are just sharing the answers publicly. You can DMCA al

Can't one just write new assignments each year? Of course the students will share the answers. These ones are just sharing the answers publicly. You can DMCA all the public repos but there will still be groups of students who pass the answers on to next year's class. In fact, I'd argue that in the case of the solutions being shared publicly, at least everyone can benefit equally instead of only those who are part of the clique doing the sharing. The only real answer is to either write new assignments each year, OR, simply assume that all students will have the solutions to the assignments. A good way to tell if students are really doing the homework is to have a 10 minute homework quiz in class where the students answer a question very similar to a homework problem. Those who have truly done the homework will be done quickly and those who haven't will struggle mightily.