Plagiarism

Many students here are a victim of plagiarism. On a smaller scale they copy day to day assignments and on a larger scale, they copy projects and presentations. A lot of students who actually bother working on their projects and assignments themselves, get the shorter end of the stick as those who copy already know what is lacking and have most of the content and material available to them. The teachers should devise some system whereby authentication and ingenuity can be identified and thus credited. How do we raise our voice against such unfairness?