Buy both and save 50%! The ChemQuiz.net and PhysQuiz Dashboard site licenses allow for unlimited student accounts and assignment creation for one school or one college/university instructor. Your site licenses will be activated within 24 hours of receipt of payment and are valid for one calendar year (12 months) from the time of purchase. Please email me at chris@chemquiz.net with your school name after you've completed payment so I can activate your site licenses for both Dashboards. Thanks so much for your support!