Maybe the book: <a href="<a href="https://www.packtpub.com/drupal-for-education-and-e-learning/book">https://www.packtpub.com/drupal-for-education-and-e-learning/book</a>">"Drupal for Education and E-Learning"</a>. They have a set up for teachers and students and registering and grading that might be extended and modified to your use case.<br clear="all">
<br>-- <br><div>Best Regards,</div><div>James R Stone</div><div><a href="mailto:fndtn357@gmail.com" target="_blank">fndtn357@gmail.com</a></div><div><br></div><div><br></div>"The skill of coding is to create a context in which other people can contribute."<br>
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