good

It is a fascinating subject, that's why I listened, however,

The young lady giving the lectures to be polite should have a desk job. Very poor public speaker with nervous hand gestures, monotone delivery,hard swallowing. What is an interesting subject matter becomes insufferable. That said, perhaps the use of charts listing types, locations and ancestry, specific features, etc. would help keep track of a vast subject matter, alas, now more of a jumble than I had anticipated. Also, please eliminate a good many of the intra-lecture pop quizzes, unless your target audience is 8th and 9th graders. Unnecessarily simplistic, bordering on insulting. The week end tests are well thought out, thought provoking.