Wandering into the school causes a Vetala and some Chonchons to rush you and for some reason you end up battling outside. “Take it outside” has a whole new meaning. After the fight, one of the desks holds another Bhakti part, this time an Aspheric Lens . A door on the left leads you to the roof where you can find two Spheres containing the Pleiades Hi-Powers (US version - weapon for Sazh which massively reduce HP but can be synthesized into Damage Wall which negates a percentage of damage) and a Moogle Puppet . The Japanese version actually has a Mnar Stone instead of the Hi-Powers.
Run back downstairs and outside.