First, you are totally right about HTML/CSS/JavaScript
Second, that's a pretty cool link! I don't know Ruby, so I learned a thing or two. Unfortunately, I had to use some of my existing programming experience to save me when I experimented a bit. For example, I decided I liked 'cheese' better than 'honeydew'. That put me in a state where I needed to guess what the tutorial was monitoring for and had to replace cheese to move forward. Additionally, there was times where I experimented and it advanced a page with no way for me to go back. With some polish, this could be a very promising educational tool!
Second, that's a pretty cool link! I don't know Ruby, so I learned a thing or two. Unfortunately, I had to use some of my existing programming experience to save me when I experimented a bit. For example, I decided I liked 'cheese' better than 'honeydew'. That put me in a state where I needed to guess what the tutorial was monitoring for and had to replace cheese to move forward. Additionally, there was times where I experimented and it advanced a page with no way for me to go back. With some polish, this could be a very promising educational tool!