Since I am online, I decided to use Webassign for homework.
Well, of course, some students have had trouble with it..in particular the graphing application.
I am not saying that their graphing tool is hard to learn; in fact I might play with it myself. BUT, in this particular class, I want my students to focus on learning the material and NOT have to spend hours learning to get good with their graphing tools. For graphing: Desmos is outstanding.
Normally, I am not sympathetic to student complaints or frustrations, but here, I can see it.
College Math Teaching 