Not a CFIG, but our expectation is that glider assembly and rigging is taught from day one of instruction. It starts with preflight inspection in the early flights discussing what to look for in terms of correct rigging and safety clips, latches, etc. It then progresses to how the glider is assembled or disassembled to ensure that it is done correctly. Pre-solo is usually inspections and theoretical. Pre check-ride the student should have at least one experience derigging and rigging the training glider to be used for the check-ride.