MASK provides a SIMPLE solution for creating an interactive activity from a pdf file.
The teacher can upload their pdf file to Moodle, lay down masks that obscure parts of the underlying document and add questions for the students to answer in order to make the masks disappear.
The student is encouraged to try to answer questions correctly on their first attempt and receives a corresponding grade in the Moodle gradebook when they have found the correct answers to all of the questions in the document.
The teacher can add hint texts to be displayed after a student answers questions incorrectly in order to help them to identify the correct answer.
The teacher can additionally hide pages such as title pages and blank pages in the original pdf that are not of interest for their use within Moodle.
NOTE: For anyone considering using this module in assessments it is important to know that a student who uses the web developper functionality built into all modern browsers is able to view the document pages without the overlayed masks. As a result, in an assessment context the answers to questions should not be present in the pdf document
DEPENDENCIES: This plugin requires installation of the pdf2svg application which is available as a standard debian and ubuntu Linux package and is also freely available for Microsoft Woindows and Mac OSX