The center is a non-profit entity, supported by generous donations and tens of thousands of hours of volunteer work. (theravive.com)
Every year my colleagues and I collectively spend thousands of hours in schools and classrooms across the country helping teachers and leaders improve the quality of instruction. (blog.k-12leadership.org)
The new systems cost millions of dollars, involved fierce political fights, and involved tens of thousands of hours in observations and feedback. (nationalreview.com)