Formal education is a structured and systematic form of learning. This is the education of a certain standard delivered to students by trained teachers. To make sure formal learning is standardized and all learning institutions (e.g. schools, colleges, universities, etc.) comply with these standards, formal education in a country is governed by organizations.
In the case of the US, the Department of Education oversees formal education in all states. However, there are school districts and school boards to oversee schools on a smaller scale to handle problems that may arise in schools that the Department of Education doesn’t necessarily have to handle themselves.
Formal education is classroom-based, meaning everything a student learns comes books and other educational materials with the sole purpose of educating students. All teachers are trained and licensed to teach children, and they’re the same teachers the students will see every day to keep their education and training consistent.