The use of song in higher education spans many disciplines across the sciences (e.g. www.CAUSEweb.org/voices) and has many putative benefits, including reduced stress or anxiety, improved recall, and increased motivation or engagement. Suggested by prior findings, we have developed a new web-based resource for teaching with song where students interact with online prompts to make conceptual connections and provide examples that become part of a song highlighting their contributions. Twenty-seven songs covering many introductory statistics topics were developed along with associated prompts and assessment items to test their efficacy for learning. Students self-reported the tool was helpful in reducing anxiety, increasing engagement with the material, being relevant to their learning, and having a user-friendly interface. Analysis of keystroke data versus post-song assessments suggests the method to be effective for short-term learning. Summary results will be reported from randomized controlled experiments testing the effectiveness of 16 interactive songs conducted in 32 sections during the 2017-18 school year. Our song library and an overview video is at www.CAUSEweb.org/smiles.