Just a comment for institutional subscriptions: if you haven't found out already, you'll probably want to hire some sales people who have the ability to check boxes and get through district red tape. If you're doing it, make sure you keep the single classroom subscription price beneath the threshold of "reimbursible with a receipt" instead of "must go through the business office". The latter can really end up being very involved. (You'll still find reluctance to spend that way, but at least it makes trials viable.)

Source: gave up on the process. It seemed the larger the bureaucracy, the lower the conversion rate.