Your school shouldn’t be grounded or struggled because a teacher left. When you have a team, the absence of one teacher won’t be felt, but if you have a preferential management style, the resignation of one teacher will give you a heart attack. Your superstar teacher can even hold you and your school hostage and ask for ransom. I’ve seen this happen severally.
Why must he or she be the only teacher that knows where the keys of your school are kept? Why must they be the only ones that have the contacts of your parents and can call them when need arises? Why must they be the only ones that know the transactions done by your school? Why must they be the only ones that have access to the vital documents and the backend of your school’s portal? This is dangerous!