Google Sheets is by far my favorite Google tool. With various formulas and scripts we've been able to create systems that automate a lot of our work, and streamline processes. From an administrative perspective, you're able to collaborate with your staff and kids and helps you, keep a pulse check on your school.
Sheets 90x: Admin Edition Resources
Coaching Tracker Summary (Make a Copy) - Sheet that compiles all your teacher observation data
Teacher Tracker Resource (Make a Copy) - Sheet that you record individual teacher observation data on