This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

adj. Occurring or taking place between two or more schools.

adj. used of competition or cooperation between secondary schools

"What is important to us is the average course evaluation for a large number of classes and instructors, and the aggregation of data should largely eliminate major interschool biases in the data."

extramural