The free version of Reportcard is available for teams up to 4 educators servicing any number of students. You can always upgrade to the 'standard' or 'plus' plans to collaborate with unlimited staff (team) members.
For our paid plans you are only charged for the number of staff members in your team, should you add an additional staff member in the month, we will only charge you a pro-rata value and not the whole amount. As an example, suppose your team are on the "Plus subscription", which costs US$15 per active user per month when billed monthly. You add a new team member 10 days into your billing period and there are 20 remaining days in the month. The per-day cost for each user is US$15 / 30, so we will apply a one-off charge of US$10 (US$15 / 30 days * 20 days) to your team's credit card on file.