Children's Core Collection (H.W. Wilson) @ EBSCOhost This link opens in a new windowThe Children's Core Collection is a collection development, readers’ advisory, and curriculum support resource for educators and librarians working with elementary students. Containing more than 49,000 titles, this database covers fiction and nonfiction works, story collections and picture books recommended for readers in preschool through sixth grade. In addition, it includes professional literature for children's librarians.