Google's seminal book Site Reliability Engineering defines what it means implement devops (according to Google). It provides a fantastic blueprint for those of us in the industry, but at 34 chapters and 500+ pages, I find even though I've read the book multiple times, my brain has difficulty ingesting so much information. This project (SRE - Explain Like I'm 5), attempts to distill the material down to the core concepts and provides checklists with which to "grade" one's own SRE practices.
(This is very much a work in progress)
Google provides a companion workbook but in my experience, it is supplemental, and not the ELI5 content I'm looking for.