I'd like to apologise to those who responded to my query to submitting sketches in Moodle/Wiris quizzes. I was not subscribe to the forum and thought nobody had responded. We are looking for a single tool that can be used for 2 purposes - writing mathematical equations and making technical sketches (e.g. make a sketch of a cross section of the foundation of a block wall, sketch an electronic circuit that would increase the range of a voltage meter by a factor of 10).
Thanks for the interesting suggestions.
Brian