A more thorough explanation:

The Association of American Law Schools (AALS) is a group of law schools that have graduated at least three classes of students. The AALS is an organization that aims to improve legal education and promote high standards in the legal profession.

For example, if a law school has graduated three classes of students and meets other criteria, it can apply to become a member of the AALS. Once accepted, the law school can participate in AALS events and programs, and benefit from the organization's resources and support.

The AALS also provides a forum for law schools to discuss issues and share best practices. This helps to ensure that law schools are providing students with the knowledge and skills they need to succeed in the legal profession.