PTSTS
/
iris
/
Login
Register
TriplyDB
Iris Dataset
Browser
Table
SPARQL
Graphs
6
6
Services
1
1
Assets
6
6
Insights
Schema
BETA
Class frequency
Class hierarchy
cra.htm
cra.htm
http://coe.jmu.edu/mathvidsr/inst_strat/descrip/cra.htm
Manipulative (mathematics education)
Link from a Wikipage to an external page
cra.htm
http://coe.jmu.edu/mathvidsr/inst_strat/descrip/cra.htm