Most materials an instructor will use in a traditional, hybrid, or online course will be copyrighted. Educational use alone does not automatically mean you can freely use/upload copyrighted material in a learning management system. Although a learning management system contains password-protection, such credentialing does not shield one from claims of copyright infringement. Students hold copyright to their work, so seeking permission to use student work samples is recommended.
When you reproduce, display, perform and/or transmit/distribute copyrighted materials you are exercising at least one of the exclusive rights of the copyright holder. How can you do this legally without incurring liability or paying permission fees?
With permission: Terry Owen and Andrew Horbal, University of Maryland Libraries