Jardine created the introductory college course, which presented new or difficult material in small and digestible pieces rather than as a single imposing system that students had to either understand or fail. Jardine also insisted that lectures be interspersed with regular examinations, in order to gauge the students’ progress, and on which students had to write themes or original essays. His "Outlines of Philosophical Education, Illustrated by the Method of Teaching the Logic Class at the University of Glasgow" became one of the most popular textbooks in American higher education. It explained how to create a stimulating intellectual atmosphere in the classroom and lecture hall. It created a system of “writing across the curriculum,” as it would later be called, with compositions, essays, and research papers assigned in every class and at every level, which taught students how to think for themselves, but also how to write clear, incisive, original English prose.