Use a seat limit on a Cohort to keep class sizes smaller and encourage personal interaction. Open a new Cohort when your first Cohort is filled. Or, use a private Cohort sell a certain number of seats to an organization that wants to use your curriculum and then provide them with private invitation links to access the course for free. The seat limit will ensure that only the number of people that they've paid for can join as learners.
How to set a seat limit
Open your Cohort and select the three dots (...) at the top of the course Path directly under the name of the course. This will open a menu with additional options.
Select "Edit Cohort Settings" from the menu.
Change seat limit from “Unlimited” to “Close registration after ____ join” and enter a number. Save your changes and exit the Cohort Settings.