development of an education license or license option for Creative Commons

[email AT greglondon.com]

Since a longer message generated no replies,
I'll try a shorter one.

Can someone explain WHY an Education-Only
license needs to exist?

What benefits would an education-only license
have that would compensate for the advantages 
LOST from not using a much more public CC-BY-SA.

For reference, the software open source defintion,
http://www.opensource.org/docs/definition.php
item #5 says "no discrimination against persons or groups"
item #6 says "no discrimination against fields of endeavors"
explanations are included immediately afterwards.

For what reasons are the lessons of open source
that were learned in the software world being
ignored by the push to create an eductation-only 
license?