About: http://webisa.webdatacommons.org/365647811

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	Virtual manipulatives are free, available to the entire class, and working with them does not require tables or other large spaces.
http://www.w3.org/ns/prov#wasQuotedFrom	techlearning.com