Telling your children that their parents are divorcing isn't going to be easy. You have to ensure that you are explaining it in a way that they can understand. But the work that you have to do doesn't end there. You also have to figure out how to help the children thrive after the separation.
Children who are in school will face specific challenges when they return. There are some ways that you might be able to help them adjust so that it doesn't impact their schooling.
Since your child's teachers and school administrators spend a lot of time with them, you need to alert them to what is going on. Knowing about the divorce gives them the ability to address any issues that the child is having because of it. They may know what signs to look for that might signal the child needs some extra help dealing with the life change that is going on.
Another option is that you can set clear expectations and routines for the children. If you are able to do this with your ex, your children will know that they have both parents pushing for them to succeed. By having this type of stability, your kids can focus on what they need to do.
You can also let the parents of your children's friends know about the split. They might be able to help you by providing your child a safe place to escape the stress of their parents' divorce. Those adults might also be able to help your children work through the challenges they face.
Make sure that you have a solid parenting plan that outlines what each parent is expected to do. It should also include a parenting time schedule and rules for which parent makes which decisions.