Is Education still acceptable?

Yes, the v4 reference guide explicitly mentions education, in similar terms to what the 2009 reference guide says.

In the final paragraph, "Achieve exemplary performance in an existing LEED 2012 prerequisite or credit that allows exemplary performance, as specified in the LEED Reference Guide, 2012 edition. An exemplary performance point is typically earned for achieving double the credit requirements or the next incremental percentage threshold." Are we now to refer to LEED V4 ref guide, not 2012?

Yes, v4. That's a typo that's being fixed. 

Right on! Thanks.

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Good question, my initial reaction is probably not because of the overlap in intent, and because the Occupant Engagement option requires a level of ongoing tracking of strategies and performance than an NC project would typically support. Also, based on the published Innovation Catalog on USGBC's website, NC projects can pursue Green Building Education but I don't see Occupant Engagement listed as an option. If you go to the Innovation Catalog for O&M, both are listed, so I think O&M projects have a choice for which one they want to pursue. Whether O&M projects can pursue both would be the next logical question...