I quit teaching due to a stupid certification issue. Basically, they wanted me to take four courses that had absolutely nothing to do with what I was teaching in the classroom. I taught electronics and one of the first computer / networking repair courses in the State of Florida (1993) at a vocational school (technical center). After six years of teaching (won rookie teacher of the year the first year), several awards, received 100s of thousands in grant money, and my course copied throughout the state, I quit. I also had the highest job placement and the most successful students. I simply refused to take a History of Vocational Education course after the first three courses were a total joke. They told me, it is my way or the hi-way. I took the hi-way.
MANY have, including those who were certified!