This is a special seminar about teaching by Leon. The entire school is wellcome to the seminar. Abstract: Given the imperatives to achieve the same high quality teaching with less expenditure of effort I hope to start a trend where colleagues share publicly with each other little tricks and techniques that they have found worthwhile. I’ll also state upfront I don’t believe people should be forced to use a common method or framework, or that one way might be better than another. However, I do believe that the more diverse methods you have access to and are aware of, the better you can choose one that suits your needs and personal style. I’ll talk about what I do with the advanced 3rd year course MATH3977 to cope with the problem that even the best students have had insufficient practical experience at calculating total and partial derivatives in non-abstract situations with sufficient ease and accuracy to allow them to pay sufficient attention to the new layers of content and skill that need to sit on top of this. I will talk about what I do, why I do it, how I do it, how much effort it took, how much effort it continues to take and the patterns of student usage. Everything is based on anecdotal evidence, some student feedback and personal opinion. Please come long for a relaxed and low-key presentation that I hope will be informative and maybe even inspiring.