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) perspective is grounded on identifying strengths in written language that may be present in students' responses to classroom writing activities. We used MLL to examine the compositions of 19 students in grades 4-9 who were classified with SLDs and struggled with academic writing. Their writing assignment was to explain how astronauts wrote about space exploration. The MLL approach revealed hidden strengths at the big picture (global or thematic) and close-up (local) levels of composing. Patterns of strengths discovered at the global and local levels are described with four case examples and instructional implications are noted. Suggestions for treatment are also provided.