In-world sessions of Teaching with SoaS courses take place at "Learning Lab" on the OpenSim grid Craft World.
How to visit Learning Lab without creating an account on Craft World Grid (using HyperGrid)
If you already use one of the many Hypergrid-enabled OpenSim grids currently available (like Kitely or DigiWorldz, for example), you don't have to create an account on Craft World grid in order to visit Learning Lab. You can visit Learning Lab just by teleporting to the following Hypergrid address from your usual grid:craft-world.org:8002:Learning Lab
To find out if the OpenSim grid you use is Hypergrid-enabled visit this page: https://www.outworldz.com/hyperica/gridswide.htm