For people 4 years of age or older:
[Questions 18-25 are asked of people aged 4 and older.]

18. Does (Name) currently attend or has attended an educational institution offering preschool, primary, secondary, post-secondary or technical education? (PerEd01)

The rest of the module (with the exception of the question about knowing how to read and write) is directed towards people 4 years of age or older.

Does he/she currently attend or has attended at some point an establishment of preschool, primary, secondary, post-secondary, or technical learning?

The question seeks to identify the people 4 years or older that currently attend or attended at one time a formal education center.

According to the United Nations Educational, Scientific, and Cultural Organization
(UNESCO):

Formal education is the "education given in the school system, high schools, universities, and other establishments of formal education. It normally constitutes a continuous "ladder" of learning of full days for children and youth, generally starting at 5 to 7 years until 20 or 25 years of age.

• Select one of the options "Yes, attends a public establishment. . ." if the person declares attending an establishment of formal learning at the moment of the census or if, when enrolled, does not attend for momentary causes. In this case, mark the option that corresponds, either a public or private establishment.
• Select the option "Does not attend, but has attended" if the person declares having attended an establishment of formal learning at some point.
• Select the option "Never attended" if the person never attended an establishment of higher learning.