If they are all photos of school activities, they can be called "colorful campus life" and so on.

If it is a photo of some students studying, competing, winning prizes and performing, it can be called "showing my style" and so on.

If you don't use pictures of school and classmates, it depends on the specific theme.

For example, environmental protection, patriotism, publicity of all aspects of knowledge and so on.

Decide a suitable topic according to the content.