So you have a teacher iPad—congratulations, but why do we give you one?
Well, for lots of reasons, including:
The problem is this means you will have a load of content (if not all of it) in your camera roll which is student/college related, if you use the same device on holiday, well, all of your snaps will get mixed up with your school content - not ideal. If you connect this device to your personal iCloud account all of your personal media on other connected devices will also all stream into the same camera roll all 'polluting' the stream. if you connect it to your classroom iCloud account, everything you capture will get automatically pushed to all the kids iPads in your classroom, which depending on you could be a good thing or a bad thing
You could easily solve this by just not connecting your iPad to your own iCloud account, the problem with this is being connected to the iCloud is really useful, being able to sync all your Apple content from other apps like Notes, Pages, Safari bookmarks et cetera can be really useful, not to mention all the content on iTunes you might have purchased. So how can you have your school iPad connected to your iCloud account and avoid this?
Easy, just go into your iCloud settings and switch off Photos. Everything in your camera roll is now only content you captured with this device, you can still transfer it to other devices using email, Airdrop, apps like Send it Anywhere. If you install the Google Photos app, it will sync all your camera roll content to your college GApps account, or you can choose to select certain images/videos to 'backup' so they're all easily accessible from your laptop—winwin! In fact using the suite of Google Apps (Google Drive, GMail...) is another easy way to keep your work/home life separate on the same device.