As a teacher, you probably take lots of photos of your students in the classroom. You may even have students or assistants act as photographers. It’s useful to save all those photos in one place. This lets you access the photos from any device, makes it easy for you to share photos and albums with everyone including parents, and protects your images from loss if a device breaks or becomes inaccessible. If your device is running out of space, you may also want to save your photos and videos in Google Photos so that you can delete them from your device and free up space. This is especially important if your school uses devices that only have 16 GB of space.
If your school uses G Suite, Google Photos is a good option, as it is included as an app in your G Suite account. Google Photos works on whatever devices your school may be using. To use Google Photos, you need a Google account. Then install Google Photos on your Android or iOS device, or on your Mac or Windows machine, or access Google Photos on the web. Once you have the app installed, you can setup Backup and Sync for Google Photos on your device.
Note that if you set the quality of your photos to high in Google Photos, your uploads do not count towards your available storage limits. This means that you can save an unlimited number of high quality images (up to 16 mega-pixel) and videos (up to 1080p), which is high enough quality for people who mostly access multimedia in digital formats.