Tools for research and education should make better use of the capabilities of the Web.
I want to know X. What is the minimum I need to get there?
Prove that if the inverse of a matrix exists then it is unique
CuratedCourses: a new approach to cataloging educational material
CuratedCourses: every definition and theorem in introductory linear algebra
Three books on linear algebra (so far)
Repository of SageMath cells
Supplementary material in the margin