Once you browse to the course you select the first section and start reading. At the bottom of each page you click next and are presented with 5 sentences. You select the sentence included in the page you just read and it takes you to the next page. If you select the wrong sentence you will be sent backwards to a previous page. Pay attention to what you read so you will recognize the sentence to click and not select the wrong sentence.
Any subject matter in textual form can be used. We are accumulating a vast library and any publicly available textbook or exucational content can be used. Simply request the subject of your interest and see if we can provide it.