[Logos]

I know the feeling. Particularly if it's my equipment.
Basically your teacher is right. You should just concentrate on the design. You shouldn't be up ladders focusing and you shouldn't program. But I do understand that it is sometimes quicker than letting the op do it but remember, if there is a problem during the run when you arent there if the Op programmed the show then he/she should be able to fix the problem quicker.