OpenTutorial is a task oriented website, a place where you come to learn "how to" accomplish a specific task.
Example: How to Brush your teeth
Open tutorial is NOT a place where you come to learn about something Wikipedia is an excellent website for that purpose.
Example: Teeth brushing
OpenTutorial is an Open Repository meaning that anyone can post a tutorial here and anyone else may edit it. Resulting in a vast repository of peer reviewed tutorials.