I show how to fill in a PDF document on a computer (PC or Mac) using Adobe Reader (DC version), with the writing and drawing tools provided in the software.
In other words, your children or students can use the digital version of Math Mammoth totally paperlessly, if you so desire - no printing necessary! They can write the answers in the document and even DRAW shapes and lines in the geometry problems.
It's also possible to do this on a tablet, with various PDF apps that allow annotation, but that's not covered in the video. All of this is possible because Math Mammoth files are enabled for annotation.
Check out Math Mammoth curriculum here:
https://www.mathmammoth.com