About: http://webisa.webdatacommons.org/45260607

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	Your observations that particular approved texts may strait-jacket math teaching is, of course, one of the strategies, that is, aligning tests to texts in order to press teachers to teach certain content.
http://www.w3.org/ns/prov#wasQuotedFrom	wordpress.com