Is it selfish to not let others copy off my work that I worked so hard on?

  1. You’re not obligated to help the other groups. Sleep easy.
  2. If you decide to help other groups, you could possibly use this as social capitol later. You’ve helped them, they can help you. You never know when you may need help. It’s one possible way to build social networks, but it’s completely optional.
  3. You can also let your prof know that you’re helping others, but please don’t do this in a whiny way, which I don’t think you would. “Would you prefer that I help my other classmates, which I don’t mind, or would you prefer that I refer them to the TA for the course for extra help?” Who knows? The professor might appoint you as TA and pay you for this! Not likely but a kind of a funny thought, but you never know.