Prior research has consistently shown that motivation is a catalyst for students' writing performance, with important implications for writing instruction. However, this body of research has mainly relied on a variable-centered approach that does not acknowledge the similarities and differences between and within groups of students. In the current…

One aim of this article is to shift mindsets from the traditional identification of written language abilities that are "missing" in students with specific learning disabilities (SLDs) to writing assessment as the discovery of more complex language strengths foundational to success across disciplines. The multiple language-levels (MLL)…