If you are playing on a web-based "unblocked" site, try to find one that allows you to export your .sav file to your Google Drive. If the site gets blocked tomorrow, you can take your save file to another site and keep your progress.
: Download a GBA emulator (like VisualBoyAdvance) and the Radical Red ROM onto a USB flash drive. You can run the pokemon radical red unblocked at school repack