About: http://webisa.webdatacommons.org/217390482

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	Concrete Operations: Approximately 6 - 11School-age children can perform concrete mental operations with symbols-using numbers to add or subtract and organizing objects by their qualities, such as size or color.
http://www.w3.org/ns/prov#wasQuotedFrom	scholastic.com