In Florida, we are required to have fire drills once per month with two drills during the first 2 weeks of school, and tornado drills twice per year. Volusia County (which is the district where I attended public school) requires one lockdown drill (Code Red), one bomb threat drill (Code Blue), and one Haz-Mat/Shelter in Place drill (Code Yellow) per year.
In my junior and senior years of high school we only did one of the TWO REQUIRED tornado drills.