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A visual approach to understanding the chain rule and related derivative formulae, for functions from R to R and from C to C, is presented. This apparently novel approach has been successfully used with several audiences: students first studying calculus, students with some background in linear algebra, students beginning study of functions of a complex variable, and current secondary school teachers obtaining professional development. (Contains 9 figures.)

This paper recounts how a narrow policy research project with a multidisciplinary team of undergraduates and faculty, concerning how blockchain might address shareholder-related ownership and voting issues, led to our coming to know, then addressing, the level of understanding of blockchain technology among a subset of the public: state government staff; elected legislators; university students, faculty and staff (including upper-level campus administrators); and other members of the public. We include how the workshops we developed can incorporate hands-on blockchain education into the university-level accounting and business curricula. [ABSTRACT FROM AUTHOR]

Derivations of two infinite products of 'pi', Wallis's and Vieta's, are presented. A method to accelerate the convergence of Vieta using calculus is presented, and it is shown that the accelerated Vieta's formula can be used to approximate 'pi' to more than 300,000 digits.