You can't change him. He himself is the only person who can stop his violence. We can't change him. If he attends DVIP's Violence Prevention Programme there is no guarantee he will change - some men do, but many don't. He may change a bit.
Men do sometimes change a bit, maybe becoming less violent, but remaining abusive and intimidating.
You can decide for yourself whether he has changed enough . You don't have to put up with it. A woman has the right to safety and respect, to put herself and her children first and to focus on her needs. You can increase your safety. If he is intent on being violent, you will not be able to stop him, but there might be things you can do to increase your safety.