I've come across the option for showing agreements at enrollment. An agreement first has be created in Organization > Agreements. The option to show the agreement at enrollment is found in Profiles > Automated Device Enrollment Profiles when creating an iOS profile, under the Onboarding tab.
We haven't used this, as we do enrollment and setup before giving to users. I don't know if there is a way to collect responses, or if it requires to accept the agreement to complete enrollment.
Alternatively, if you are a tinkerer, there are third-party solutions like DEPNotify or IBM Notifier. Would end up being a project.
We also do the enrollment before the student receives the device. Since most schools have acceptable use agreements which I'm sure change from time to time I was hoping there might be some automated way to push it out in JAMF School. I guess most places must use some 3rd party digital signage software. Maybe it is because they are also looking for parent signatures.