Young Adult Library Services Association- Yet another division of ALA representing the young adult population. This list of professional tools offers many valuable resources, and this page of products and publications may also offer some good leads.
Association for Library Service to Children - A division of the American Library Association (ALA) tasked with promoting services to children. ALSC produces vetted and currated lists of resources like recommended booklists, digital media, and ebook resources. Here's an example resource found through ALSC:Ethical Culture School Library
American Association of School Librarians - Another division of ALA representing and promoting school library resources. Their partnerships and collaboration page may provide you with some leads.