The ChemQuiz.net Dashboard site license allows for unlimited student accounts and assignment creation for one school or college/university instructor. Your site license will be activated within 24 hours of receipt of payment and is valid for one calendar year (12 months) from the time of purchase or the expiration of your current license, whichever is later. Please email me at chris@chemquiz.net with your school name after you've completed payment so I can activate your site license. Thanks for your support!