This is a 'beyond-beginners' ONLINE course. If you have not completed one of Richard's intro courses but have some experience with GeoGebra then check the prerequisite skill list at the end of this overview. This course guides you through an engaging, inquiry-based, hands-on approach to teaching Yr 9-10 trigonometry. The course looks at building files which serve to get students thinking rather than simply to deliver information. Participants are encouraged to input their own ideas into the unit. The prerequisite skill list: Constructing figures using: point, line and segment tools, perpendicular-parallel line tools, polygon, circle and all measure tools, slider, checkboxes, text tool and move-drawing-pad. Modifying constructions via the properties box. Creating basic formulas using dynamic text. Fixing text to points. Accredited PD Hours=9