Abstract: Methods and systems are disclosed for performing generating AR experiences on a messaging platform. The methods and systems perform operations including: receiving, from a client device, a request to access an AR experience; in response to receiving the request, loading a first AR element of the AR experience without loading a second AR element of the AR experience; determining that a condition associated with the second AR element is satisfied; and in response to determining that the condition associated with the second AR element is satisfied: retrieving, by the client device, the second AR element from a server; and loading the second AR element for presentation on the client device.

Abstract: A classroom configuration is described that includes a computer having a wireless communications interface and a plurality of student workstations. The workstations each include a work surface, a projecting device mounted proximate the work surface and operable for projecting images onto the work surface, a light emitting device, a tracking device mounted proximate the work surface and operable for capturing the image projected onto the work surface and for tracking movement of the light emitting device, and a processing device communicatively coupled to the projecting device and the tracking device. The processing device includes an interface operable for communicating with the computer via the communications interface.