Senate Bill 19-129, concerning the regulation of online schools, calls for the Colorado Department of Education's Office of Online and Blended Learning to produce an annual report on the number of students who withdraw from Colorado K-12 online schools after the pupil enrollment count date. This report is required to include the dates on which students withdrew from enrollment in a Colorado online school, the grade level at which the students were enrolled at the beginning of the school year, the grade levels at which the students were enrolled when the students transferred, and information on whether the students enrolled in another public or private school or home-based education (home school) setting or graduated or completed high school within the same year. This report includes information and data for the 2020-2021 school year. During the 2020-2021 school year, 5,503 students were coded as withdrawing from an online school after the October Count. Based on an analysis of the 2020-2021 data for students enrolled in both types of online schools, the three most widely assigned exit codes were for: (1) students withdrawing and transferring to a school in another school district (n=1,548); (2) students dropping out (n=1,171); and (3) students transferring to a non-public home-based education setting (home school) (n=956).