There are already an uncountable number of linear algebra textbooks on the market. This is not meant to be a formal math textbook, but is instead aimed at those looking to pick up practical application-level insights and skills. (The "Why this matters" sections in the book are a worthy improvement on the state of the learning art by themselves, IMHO.)

This collection of lab exercises seems far better suited to the purpose than the abstract proof-based resources that some of you seem to have in mind. Fortunately, those resources are still available to those who want to go further into the theory.

And if you feel you have something to add to linear-algebra pedagogy yourself, well... what's stopping you?