Under Surveys & Training you can set up training material as well as question for your workers to answer after the learning material has been reviewed.
First you will go to Settings-->Surveys & Training. You will need to click "new quiz".
When you press "new question" it will give you options of what type of question. Pick "Display Content".
Save this learning material. Next you will want to set up your questions. See examples below:
Once you are done you can go to a worker's file and require them to complete this training.
When the worker is logged into the workers site they will see the required training here:
Here's examples of what the workers will see when they go through the training:
If the worker has incorrect answers they will need to retake the survey.