Youth with and at risk for disabilities served in alternative education settings frequently struggle with the writing process, which impedes their ability to communicate ideas and opinions with others. Providing explicit teaching of a writing strategy is necessary for this population of youth. This study examined the effects of self-regulated strategy development (SRSD) with self-determination skills on self-advocacy-focused writing probes (e.g., persuasive) for adolescent female youth in a juvenile justice setting. Emphasis was placed on teaching youth how to use persuasive writing as a tool to self-advocate for things they want or need. The SRSD instructional approach was investigated using a multiple-probe-across-participants design to evaluate the effects. Visual analyses indicated a functional relation between SRSD with self-determination instruction and youth's writing skills. All youth demonstrated an increase in organizational quality and self-advocacy in writing from baseline to independent practice. Limitations to the current study and future directions are discussed.