Sure, they take all rights when you sell them a story, but they have granted permission to reprint my story twice and in both instances have sent me a check. I received the following letter today:
Highlights for Children has granted permission to reprint your material as follows:
Story Title "My Sister Snores"
Permission Granted to N. Carolina Dept. of Public Instruction
As a courtesy, you will be receiving, or may already have received, a check from us.
I love unexpected surprises!