Some educators will object that there are no studies that prove this claim, and they are right. Instead of studies, I appeal to common sense. KISS won't do much for vocabulary, but, as opposed to traditional instruction, the primary focus of KISS is how words work together in sentences to create meaning. Unfortunately, even many English teachers claim that knowledge of grammar does not improve students' writing. But what these teachers have in mind is the traditional instruction that focusses on individual constructions.
Words stand for ideas, and sentences hold words within a specific context.
Because it makes sense of grammar, because it uses a model of how the brain processes language, because it constantly involves the analysis of how words fit together in sentences to make meaning, the KISS Approach will improve students' writing. Unlike the rules of syntax, the rules of usage are not very systematic. This page is intended as an introduction to the KISS Approach for the general public. The site itself is large and difficult to keep organized. It includes all the instructional material, assignments, and sample papers for the courses I teach at Penn College, my bibliographies, my research workshop, and free instructional material on the KISS Approach for teachers.