Youth with and at-risk for emotional and behavioral disorders (EBD) served in alternative education settings often experience challenges with writing due to various deficits across academic, behavioral, and social-emotional domains, especially in the area of writing. These youth also are less likely to engage in self-determination skills such as self-monitoring and self-awareness -- key aspects to the writing process. This study examined the impact of the self-regulated strategy development (SRSD) instructional approach teaching the POW+TREE (e.g., Pick my idea; Organize my notes; Write and say more; Topic sentence, Reasons [three or more], counterargument(s)/refute; Explanations for each reason and counterargument(s); and Ending) mnemonic with an integrated self-determination skill acrostic to determine the effect on youth writing performance and self-determination skills. The POW+TREE mnemonic and self-determination skill acrostic were taught to three, adolescent female youth at-risk with EBD in a secure juvenile justice facility. An alternating treatment design was used to examine youth writing performance across three response modalities: a) paper/pencil, b) iPad, and c) laptop. A functional relation was found between the SRSD with self-determination intervention and the increased organizational quality (i.e., essay elements) for written essays for all youth. Treatment of fidelity implementation was 100%. Youth found the intervention (e.g., POW+TREE strategy; self-determination acrostic) socially valid and favored writing on the iPad or laptop versus the paper/pencil option. Self-determination scores improved for one youth and remained stable at high levels for the second youth. The third youth was unable to complete the study. Limitations and future directions are explored. [The dissertation citations contained here are published with the permission of ProQuest LLC. Further reproduction is prohibited without permission. Copies of dissertations may be obtained by Telephone (800) 1-800-521-0600. Web page: http://bibliotheek.ehb.be:2222/en-US/products/dissertations/individuals.shtml.]