Sign in once and every tool you're allowed to use is simply there — attendance, gradebook, tests, lesson plans, and the learning apps your students use. If your school turns on a new app, it appears; nothing new to install, no new account to remember.
And because the whole school runs on one system, your work compounds: the attendance you mark powers the SMS a parent receives; the test you set fills the gradebook; the grades you enter become the report card. Nothing is typed twice — by you or anyone else.