To play around with the active record interface for this gradebook schema, we must first create the database. In an interactive python terminal (either "ipython model.py" or "python -i model.py"), run the following: >>> db.init_db() That will initialize the database with the schema in the file 'schema.sql' and the data in 'testdata.sql'. Now try out some of these: >>> Students.all() >>> [s.full_name for s in Student.all()] >>> Student.get(1).get_grades() >>> Assignment.get(1) >>> Assignment.where(points=20) It is a useful exercise to uncomment line 68 of model.py to enable logging and see the SQL that the program executes to fulfill these requests.