A lot of school administrators were teachers at one point. This is not always a good thing. Problems can occur when they try to treat the teachers who work for them the same way they did their former students.
Too much bossiness and pushiness will drive your teachers away. Don't be so insecure that you feel like you have to try to prove that you are in charge all the time.
Teachers will rebel against the bossy, pushy management style even more than most other people would. They are used to being in charge most of the time, so it's not easy for them to take being disrespected.
So, administrators, be sure you have an attitude of working with your teachers and not against them. Let them know that you are in charge, if needed, but don't feel like you have to force it down their throats.
The students will be the ones who benefit.