The web page from an Australian site gives a nice explanation of Data Hubs, Wires and Types.
http://www.techxellenttraining.com.au/pdfs/FLL_pdf/Using%20Data%20Hubs.pdf [1]
Material Type:
Tutorial
Education Level:
Middle School [2]
High School [3]
Focus Subject:
HW Platform:
NXT [6]
SW Platform:
NXT-G [7]
Interactivity Style:
Expositive [8]