I think, in the last Ars Technica article I linked, I mentioned that I love them. Just in case I didn't, let me say it now: I love Ars Technica. This article more clearly and succintly describes the methods for how and why proteins are purified than I think any of my professors ever explained. I think my biochem professor (Hi RD!!!) came the closest to giving us this level of detail, but even he, I think, focused on the methods we had available to us in our lab and the techniques we'd be using. This is a nice overview. Pair this article with a video showing the actual equipment and techniques (Yes, I'll go hunting for it & cross link when I find it) and your budding biochemists will be well-prepared for the skills required of them in the lab! Not only that, the ordinary people who never go near labs but may rely on protein based medications (like insulin) can read this and get a larger appreciation of the work that goes into ensuring their medication is safe and effective as well as affordable.