About: http://webisa.webdatacommons.org/82478892

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	You may wish to use non???verbal signals such as a bell or other sound, a change in lighting, or American Sign Language for think, pair, and share.
http://www.w3.org/ns/prov#wasQuotedFrom	nctm.org