It's hard to offer input when you provide limited information about your situation. Is your husband seeking help or making a genuine effort to improve? How old are your children?

In my experience, someone can not change unless he genuinely wants to put in the work. Your children do not deserve to be in a situation where horrible things are said to them. I would encourage you to take whatever steps are necessary to let your kids know that the behavior is unacceptable. The school may be able to point you in the right direction.