Work through the first topic, mortgages, carefully. It will help you with the more difficult topic, bonds payable. You'll read more about that in the chapter. This is a difficult chapter. They are given on the web page and in the textbook.
Bonds is a difficult topic.
Work slowly and carefully, and ask lots of questions. They cover the same material with different examples. Mortgages and bonds payable are topics that require lots of practice. The forums relate to bonds. I'll participate very actively in the discussion this week, so check in and read the comments even if you don't have any questions.