An age of a person when attending lower-level schools is customary. The period in a person's life when one is legally required to attend school. (adjective)
Wiktionary.org : Text is available under the Creative Commons Attribution-ShareAlike License
Use "school-age" in a sentence
"Material published on a psychology website confirms that by school-age, children often face prejudices based on their appearances."
"In a school-age child, a poor body image may result in social withdrawal and poor self-esteem."
"The Administration for Children's Services said that nearly a third of children affected by these closures became school-age and that "many children are going to vacancies in other sites run by the same sponsor or to other centers in the community," according to a spokesman for the agency."