Finance 101: Dow Jones Explained

The Seattle Times

Difficulty: 3/10; Read time: 3 minutes


This is a quick overview of the Dow Jones Industrial Average, and how it is calculated. Answers questions like:

  • What is the Dow Jones industrial average?
  • How is it calculated?
  • Is it relevant to the current economy?


Recommended as a very quick read to understand the basics of the DJIA

Understanding how vaccines work

Center for Disease Control
Difficulty: 4/10
Read time: 10 minutes
PDF can be downloaded here


This is a brief primer provided by the CDC explaining the details of how vaccines protect the body from subsequent infection. It outlines general concepts including

  1. How vaccines work
  2. Different types of vaccines
  3. Why some vaccines require multiple doses


Recommended as a short overview of how vaccines work, and why they are important.