You will need a utility like WinRAR or 7-Zip to open it.
The file does not appear to be a widely known public document or a standard software package. Instead, it is likely a compressed archive containing specific educational materials, localized data, or private user files. GMRC65.rar
Lesson plans, slide presentations, and activity sheets bundled for educators to use in the classroom. You will need a utility like WinRAR or 7-Zip to open it