It's a problem here because the new forum format won't let me use my spell checker. I'm good at spelling but my fingers are dyslexic and I need the help of the Google spell checker!
Bless you for caring about the kids, especially those who don't get so much of it at home. Perhaps those who you help are worth the aggravation caused by a few others.
I admire your dedication to the job.
Driving a school bus is an onerous responsibility and that is why I believe that controlling the children should be in the hands of a second adult. If that's against the rules, then the rules are wrong and should be changed.
If bad student behaviour...
Unsupervised children in groups will often play up and, if the driver was the only adult present, then those students described in the OP were unsupervised. It would not be reasonable to give the responsibility of keeping order to the driver either. A new driver is likely to be tested by the...