And some remarkable variants on the challenge:
Our building conducted 500 walk through this year! Design, Test, Reflect! @eduleadership— BSHS Principal (@NewvilleP) May 12, 2017
I'm a department chair of a department of 10 members in high school. During this school year I didn't get into 500 classes this year but I did visit every member of my department once every two weeks providing them feedback (email or face to face). That's 180 classroom visits in addition to my teaching classes. The visits have given me evidence of what I thought was happening, that I have an awesome department that knock it out of the park when it comes to educating our students.
Mathematics Department Chair, Central High School, Evansville, IN