There are guided notes provided for each unit. After clicking on the link for a unit, there is a chart that lists the guided notes, with both student and teacher editions. The guided notes are available as PDF documents, and the teacher editions (answer keys) are password protected. To open the teacher versions, send me an email to show that you are a teacher, and I will send you the password to open these documents. When you click on the link for the answer key, it will go to google documents, and say that a view of the document can't be generated. Click on file, and then dowload, and then enter in the password to open the document.