You can make college-based projects i.e. projects that will help teachers and students communicate to fix a schedule, submit and grade projects, or even hold online real-time tests with monitoring options.
If you are creative enough, try making a game! There isn’t anyone I know who doesn’t enjoy playing games!
You can make a library database that makes book suggestions based on past books issuing history or blocks certain books like a kids mode version of the library.
No matter what idea you finally choose, make sure your code is as optimized as possible.
