Desvestirme is the right one :)
B me ducho is the correct answer
Do you mean to address your teacher?
If so then you would say "Maestra..." then tell her what you need to tell her
The te part of the negative command would involving tú would be
Before the command
For example: you need to clean yourself
Correct way to say it: Tú te necesitas limpiar
Hi. Templa can be all of the options! It's neuter, plural and may be nominative or accusative according to context.