About: http://webisa.webdatacommons.org/236122181

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	Make sure students have a chance to handle and use different types of mirrors and lenses so they can observe the images they create and how the distance of objects from the mirrors or lenses affects the images.
http://www.w3.org/ns/prov#wasQuotedFrom	ck12.org