Assessment and instruction of reading tend to dominate current discussions of early literacy. Shifting the focus to writing, this article addresses the assessment of writing for students in kindergarten through second grade. Using curriculum-based measurement of written expression for beginning writers, teachers can measure growth of smaller increments of writing skill development (i.e., number of words written in a given time or using correctly sequenced letters or words) and may use this method repeatedly across the school year to show growth and identify weakness in students' early writing skills.