we currently aren't agreeing on how to discipline our DD who is 6 for misbehaving in school...talking, not listening, nothing earth shattering but stuff she needs to be changing.
or when you disagree do you still stand behind your DH if he feels strongly about doing something?
Re: how do you handle when your and your DH disagree on discipline?
I would wait until he's calm, has a beer in front of him and then approach the situation that we're both frustrated but need to come to an agreement on how to handle this.
We had the same problem with DS1 in kinder with severe bad behavior (he was almost going to be suspended!). We were punishing and punishing and it wasn't until we switched and started rewarding him that he went 100% perfect. We gave him a dollar each time he came home with a good report and then a bad report meant he had to give us a dollar. I also started talking to him about what he was going to buy with his money to give even more incentive.
You can also do some role playing at home or talk about what to do when you want to talk but someone else is talking (i.e. keep it in your head until recess. Think about something else, etc.)
I usually let DH do his punishment thing and I only intervene if I think it is too radical (that's happened once before).
In regards to parenting, we do the "united front" thing, but we have very similar parenting styles so it hasn't been a big issue.