I went through in 2013 as a CSO. You get a few flights out to an area to work on stalls, forced landings, slow flight, etc. On these flights you fly the entire time unless the pilot is showing you something. After that, every flight allows around 30min in an area and a low level route. The low levels were off of a TPC and flown around 1000 AGL. The charts are pre built and based on a set ground speed. The CSO has to adjust airspeed and heading to achieve the proper course and groundspeed to arrive at the target +/- 1min. As stated, the pilot will fly the route and the CSO directs. If you have any specific questions I'll be happy to help.