This study aimed to develop an outcomes-based learning guide in Electricity and Magnetism using constructivism. One-shot pretest-posttest experimental design was used with 24 students. The learning guide was rated as “very highly attainable” in terms of learning outcomes, “very highly valid” in terms of content, “outstanding” in terms of structure and organization, and “very highly appropriate” in terms of both learning and evaluative activities. Overall, the learning guide has “very high validity.” The students progressed from a “poor” performance to a “very good” performance. Post-attitude level is statistically higher than pre-attitude level. The learning guide is highly recommended for use as a physics instructional material.