What is Mitigation? According to FEMA, Mitigation is defined as: the effort to reduce loss of life and property by lessening the impact of disasters. Granted, there's a whole lot more to it than that, but the gist, if one were to call it that, can be summed up nicely by the poem provided in this link called "The Ambulance in the Valley".
Mitigation activities for schools can, and probably should, include activities such as: structural integrity of facilities/buildings, playground/athletic fields, school grounds, and many more. It should also take into consideration things like continuity of operations, facility/building protection, a comprehensive risk analysis, ways to reduce risk, and so on.
Mitigation activities for schools can be complex. So, for schools, this is a really good place to start looking at how a school can analyze their mitigation strategies:
There are a number of links provided within this document.
Another thing to consider is looking at "model" mitigation activities other schools may have already done. Here's a couple examples:
All Hazards Mitigation Bethel School District, Bethel, WA
Re-inventing the wheel should be avoided as much as possible. That being said, we do not recommend "fill-in-the-blanks" and "cookie-cutter" plans at all.
U.S. Department of Education:
U.S. Department of Education wraps their information on mitigation planning into their document, Practical Information on Crisis Planning, Page 2-1 and forward.
Please note - while these documents and resources are directed at schools, themselves, that does NOT mean community members cannot also use them in helping schools in their own communities put together viable, realistic mitigation plans.