{"version":"1.0","type":"rich","provider_name":"EbookNetworking","provider_url":"https://www.ebooknetworking.net","title":"Adding It Up: Helping Children Learn Mathematics","author_name":"Mathematics Learning Study Committee, Center for Education, Division of Behavioral and Social Sciences and Education, National Research Council","thumbnail_url":"https://www.ebooknetworking.net/books/030/921/big0309218950.jpg","thumbnail_width":330,"thumbnail_height":500,"html":"<a href=\"https://www.ebooknetworking.net/books_detail-0309218950.html\">Adding It Up: Helping Children Learn Mathematics</a>","width":400,"height":300}