...
S&D 1
S&D 2
S&D 3
Analysis
S&D 1
This design is (we feel) fairly learnable at the cost of efficiency. It uses prompts to help the user navigate the site and find the tutorial they need, reducing the task of finding out how the website works to simple point and click operations. As a result, however, it is more difficult to speed to a specific tutorial and requires a lot of user interaction. User interaction is almost always a cause of slowdown and there are lots of tasks here. It should be offset by the fact that the target audience may not be able to accomplish their task with a more efficient interface. We imagine that the UI would have navigation elements to make it easy to backtrack in the event that the user clicks the wrong button. It is also fairly safe to use because there aren't many elements which, if the user performed the wrong action with, would put them in an irrecoverable state or make some change that they couldn't undo.