Many exciting developments have been taking place with ArcGIS capabilities and workflows surrounding imagery, rasters, drones, and the like. If you teach about imagery and remote sensing you might be spending some time this summer updating your materials.
At the same time, Esri's imagery and raster e-learning curriculum is being modernized. A growing number of web courses, training seminars, videos, and other offerings on Esri Academy are available for you to advance your skills and to use in student instruction. Additional courses on the topic of imagery will be rolled out over the coming months.
Keep in mind that different courses can be available for different software versions. Before assigning or taking a specific course, please visit the catalog page and verify that it is available for the software version you or your students will be using.
I am K-16 program coordinator on the Esri training content development team. I envision and develop e-learning and other resources to help educators grow their own skills and engage ArcGIS with students of all ages.