You didn't mention the ages of your children, which country's educational curriculum they'll be following and for how long.
Home schooling might be an option. However, it's not necessarily all that easy (again, depending on your childrens' ages). Someone will have to monitor lessons and make sure the required "homework" is done. Chances are you'll also need a reasonable internet connection (say about Rp 700,000/month).
Sometimes it can be "simpler" to enroll your children in local schools (dependent upon your visas). Then you have the language problem. But, if you're seriously considering moving everybody to live in Bali, that'd be just another challenge for all involved.
It's all possible...
Best wishes whatever you decide to do.