High School Digital Photo Lessons!?

Hello all! I recently graduated collage with my BFA in Art Education and not two weeks later have been hired by a local High School as one of their Art Teachers! The teacher currently leaving that I will be replacing teaches all digital photography which is a medium I am not familiar with other than being savvy with my phone Camera. I don't start for a month and would absolutely love for anyone out there to offer me some tips tricks and ways of learning this subject and what to teach, lesson plans, videos to watch, history to study, etc. You should know we are not allowed to use phones and have no dark room (which I am familiar with), the school does however - I'm told - has a pretty nice newer-ish fleet of digital cameras. Some of my classes will be upperclassmen second and third levels who have been doing this for years. Any and all advice is welcome and much appreciated! - Teacher Carpenter