I have seen this so many times when I was teaching prep and it was so hard on both the parents and the kids. Most of the time once the parents had gone the kids would be great. I know it is taking a took but just keep trying. It is a huge thing to go to school and start that be chapter without having you there as their comfort and safe person. Try a special trip off handshake, a now in their lunch box, talk to them about what they need to do when you are taking them to school, just keep telling them you will be there too pick them up and be positive each day (I know easy said than done).
Published 23rd February 2020