Skilling helps authors write effective worked examples in various ways. First, there is the question of who students are watching. Often, the worked example doesn't specify that. Essentially, they watch the author, as s/he steps through the example.
However, it can help to watch other students work on the example. Readers can observer the students think about the task, choose schemas, instantiate them, make mistakes, discover their mistakes, correct them, and so on.
Skilling lets authors use characters for this purpose. A character might be represented by a series of head shots of a person, showing different emotions. Here are some examples:
These photos are from a commercial service. They are not free to use. Skilling does come with some cartoon images that are free to use in Skilling projects.
Another way to enrich worked examples is with annotations. Students won't automatically understand the implications of what a character does. For example, the character might make a mistake, but students might not know that until later in. Students might even think that the character is acting correctly, an example of negative learning.
Skilling lets authors insert annotations into their worked examples, or, in fact, anywhere they want. For example, an author might type:
Ray got it wrong! He didn't adjust for the fact that the data
starts lower down in the worksheet.
The author doesn't have to worry about fonts, colors, icons, etc. Skilling will take care of that. The author just tells Skilling his/her intention: "I want students to notice something here."