That's good feedback! The challenge is: 1. There are six tutorials (2-5 minutes each) to learn the basic vocabulary. 2. It's possible to finish them all in on

That's good feedback! The challenge is: 1. There are six tutorials (2-5 minutes each) to learn the basic vocabulary. 2. It's possible to finish them all in one session, but I don't expect anyone to do that 3. I've currently avoided using cookies to save/restore progress within the tutorials, because children in schools often will use the same computer. You do make a very good point that it's a bit much to ask people to sign up just to try the tutorial. I'll think about removing that constraint (while informing the user that they'll lose their progress when they leave). Thanks for making time to check this out.