You can use Playing with Chords in any way you wish with all your current and future students.
You can print complete books or individual pages to give to students.
You cannot share the material with any other teachers, or students of other teachers, even teachers who are in the same studio. They must purchase their own license. You can share files with your students electronically but they cannot share this material with anyone else.
You cannot use the material in this course for any other purpose.
You are expected at all times to protect the copyright owners interests by not allowing illegal copies to be made, and not allowing the copyright files to escape to the wider internet.