1. Contact the publisher or author: If you know the publisher or author of the courseware, you can try to contact them to see if there is an electronic version available for download or purchase.
2. Online resource library: Many educational institutions and websites provide free or paid teaching resource libraries. You can search related badminton teaching and training course courseware in these resource libraries. Some common online knowledge bases include SlideShare, Academia.edu and ResearchGate.
3. Website of educational institutions: Many educational institutions and universities will provide teaching resources, including courseware and teaching materials, on their websites. You can try to find courseware related to badminton teaching on the websites of some educational institutions or universities.