The 'Remove' feature in School Stream allows you to remove content from view.
You can remove content by swiping left and tapping the 'Remove' button. This will remove it from view for your device only.
To restore this content, navigate to the menu ( Menu Icon at the top left of the app).
On the menu, select 'Saved'.
Then tap the 'Archived' menu, where you should see all your removed content. Here you can swipe on each piece of content and tap the 'restore' option.