UNDER CONSTRUCTION
Spock is a new activity under development that will allow construction and verification of formal proofs. The proof language is based upon that of the Ghilbert proof verifier. Example axiom schema sets are provided for propositional logic, predicate logic with equality, and ZFC set theory (based upon Metamath). Collaboration support and tutorial material will (eventually) be incorporated.
Source code for the Spock activity is available here.