Hour of Code

I have found that Hour of Code is a great tool for coders with beginning or no knowledge of programming to quickly and enjoyably be able to dive in an learn the ropes of coding with blocks and text. My only criticism is that while they do brand Hour of Code for people of all ages, and educational wise that is true, however the lesson themes are aimed towards a younger audience. So while high schoolers who are new to coding will learn a lot from these tutorials, I would recommend this for middle schoolers and bellow.

https://hourofcode.com/us/learn