If a student chooses not to do it the first time then they are most likely not going to do their best the second time, they should get punished and not get a second chance.

No, I think that if a student chooses not to do an assignment, then they should get punished for it by getting a 0 and not get another chance. Students make their own decisions and need to learn from them. Students ned to learn to be responsible and they won't learn if they keep getting second chances.