a real quick guide
Access I Was Here at https://your-site.com/
Under the users section, register all your admin, teachers, and students.
Under the courses section, register all the courses the school is offering.
Then under "cohort" of each course, register the teachers and students.
Under classes, register all the classes of the courses.
That's all! Teachers can either flash a QR code for students to scan, or manually take the attendance.