1. Unless your son is developmentally behind or has a disability there is really no reason he shouldn't be potty trained. I don't know excatly how old he is but if he starts kindergarten next fall I'll assume he is 4 or 5.

2. As far back as I remember kindergarten teachers have never changed diapers. I know at the daycare where I worked they did potty training in the 2yr old class, they weren't accepted into the 3yr old class untill they were potty trained.

3. It's understandable if he has accidents every now and then but the fact he sees nothing wrong with sitting in a soiled diaper all day, it doesn't seem he is even partially potty trained.

4. Should it be a rule that teachers have to change diapers? No it shouldn't, they are not there to baby sit and wipe his butt, they are there to teach.

Is our school system getting lazy? Maybe but that has nothing to do with the question.

Basically it comes down to, he should be potty trained at 2 to 3 yrs old, that is your job as a parent. If he has a developmental problem or a problem that causes him to have a different mentality, for example a 2yr old instead of a 5yrold, you should consider putting him in special education classes or waiting a yr or so before putting him in school.