For nearly 20 years, Software Carpentry has developed material and trained instructors to teach computing skills to researchers in science, medicine, engineering, and other disciplines. This report is an analysis of the post-workshop survey responses collected for Software Carpentry's workshops from March 2015 through July 2017. In this two year period, nearly 4,000 responses were collected. Software Carpentry workshops improve learner skill, ability, and confidence in using computing tools like Python, Git, and the Unix shell. Additionally, respondents are satisfied with the caliber of workshop instructors and helpers.