We all come to class with different skill sets or life experiences. Each student will struggle with some things and not other things, and they will differ from student to student. This is normal. Relax, learn and sew at your own pace. When I take classes, it's to learn the technique and to make samples, so I can reproduce this technique at home.
I also listen to what problems others encounter, we learn from everyone's "mistakes" - just because it didn't happen to me in the classroom does not mean it wont happen to me later. I want to know how to avoid and/or solve problems. It interesting to me, that the next week, some of the "speedsters" are completely lost when doing their homework while I am able to do it.