EarSketch is a free, web-based STEAM learning environment that engages students by teaching introductory computer science in the context of music composition, remixing, and production. EarSketch is designed for students (and teachers) with no prior experience in music or computing. It increases and broadens participation in computing through an approach that is authentic in both the computing and music domains and that encourages students to be creative and personally expressive with code. Studies of EarSketch at the high school and college levels have shown significant gains in content knowledge, engagement, and intention to persist in computing for students, with particularly significant gains for female students. EarSketch curricula are available for Computer Science Principles, Hour of Code, CS0, and middle-school afterschool programs. Professional learning workshops for teachers are available both online and in-person.