What is an Ames Test? The Ames test is a short running test used for detecting substances that cause mutagenesis. Kahn's Algorithm Each graph has nodes and edges. Thoughts on EdTech I read two articles on [After Babel](https://www.afterbabel.com) last year, about the impact of EdTech in American schools. Here are some notes I made from those articles. The notes don't add anything to the conversation of EdTech, they just summarise the articles. The hard thing about hard things The hard thing about hard things is that you never really know if you are in the middle of a hard thing. It is very difficult for you to confirm that by yourself. Only someone else — another person or another you from the future — can confirm that what you are going through is difficult. Books I recommend Whenever someone asks me for a book recommendation, I always offer something from this list. I thought it would be really nice to make my first blog post about the books I love.