Classical conditioning paradigm for hippocampal learning
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Storage of Spatial Information by the Maintenance Mechanism of LTP

Eva Pastalkova*, Peter Serrano*, Deana Pinkhasova, Emma Wallace, André Antonio Fenton†, Todd Charlton Sacktor†
http://www.sciencemag.org/content/313/5790/1141.short

It uses a conditioning task that is primarily hippocampal as it is a spatial navigation task.  They monitor the strength of CA3-CA1 connections during and after training using the fEPSP (field excitatory post-synaptic potential) slope.  

Also, for a review of hippocampal dependent tasks, see

The role of hippocampal subregions in memory for stimulus associations

Rosamund F. Langston, Cassie H. Stevenson, Claire L. Wilson, Ian Saunder, Emma R. Wood

http://www.sciencedirect.com/science/article/pii/S0166432810004857