Notes and References Section I
1 Theauthorswillconsiderrequeststoobtainorreviewtheirschool-leveldatasetsfromwhichndingsare
based.
2 Miron, G. & Urschel, J.L. (2012). Understanding and improving full-time virtual schools: A study of student
characteristics, school nance, and school performance in schools operated by K12 Inc. Retrieved March 26,
2021, from https://nepc.colorado.edu/sites/default/les/nepc-rb-k12-miron.pdf
Molnar, A. (Ed.), Miron, G., Huerta, L., Cuban, L., Horvitz, B., Gulosino, C., Rice, J.K., & Shafer, S.R. (2013).
Virtual schools in the U.S. 2013: Politics, performance, policy, and research evidence. Boulder, CO: National
Education Policy Center. Retrieved December 18, 2015, from http://nepc.colorado.edu/publication/virtual-
schools-annual-2013
Molnar, A. (Ed.), Rice, J.K., Huerta, L., Shafer, S.R., Barbour, M.K., Miron, G., Gulosino, C., Horvitz, B.
(2014). Virtual schools in the U.S. 2014: Politics, performance, policy, and research evidence. Boulder, CO:
National Education Policy Center. Retrieved December 18, 2015, from http://nepc.colorado.edu/publication/
virtual-schools-annual-2014
Molnar, A. (Ed.), Huerta, L., Shafer, S.R., Barbour, M.K., Miron, G., & Gulosino, C. (2015). Virtual schools
in the U.S. 2015: Politics, performance, policy, and research evidence. Boulder, CO: National Education
Policy Center. Retrieved December 18, 2015, from http://nepc.colorado.edu/publication/virtual-schools-
annual-2015
Miron, G. & Gulosino, C. (2016). Virtual schools report 2016: Directory and performance review. Boulder,
CO: National Education Policy Center. Retrieved December 4, 2016, from http://nepc.colorado.edu/
publication/virtual-schools-annual-2016
Molnar, A. (Ed.), Miron, G., Gulosino, C., Shank, C., Davidson, C., Barbour, M.K., Huerta, L., Shafer, S.R.,
Rice, J.K., & Nitkin, D. (2017). Virtual schools report 2017. Boulder, CO: National Education Policy Center.
Retrieved June 16, 2017, from http://nepc.colorado.edu/publication/virtual-schools-annual-2017
Miron, G., Shank, C., & Davidson, C. (2018). Full-time virtual and blended schools: Enrollment, student
characteristics, and performance. Boulder, CO: National Education Policy Center. Retrieved November 20,
2018, from http://nepc.colorado.edu/publication/virtual-schools-annual-2018
Molnar, A., (Ed.), Miron, G., Elgeberi, N., Barbour, M.K., Huerta, L., Shafer, S.R., & Rice, J.K. (2019). Virtual
schools in the U.S. 2019. Boulder, CO: National Education Policy Center. Retrieved March 26, 2021 from
http://nepc.colorado.edu/publication/virtual-schools-annual-2019
Molnar, A. (Ed.), Miron, G., Barbour, M.K., Huerta, L., Shafer, S.R., Rice, J.K., Glover, A., Browning, N.,
Hagle, S., & Boninger, F. (2021). Virtual schools in the U.S. 2021. Boulder, CO: National Education Policy
Center. Retrieved March 21, 2023, from http://nepc.colorado.edu/publication/virtual-schools-annual-2021
3 Only public primary and secondary schools are included. Programs within schools and districts are excluded.
Each included school must have a unique school or building ID assigned to it. Finally, only schools with 10 or
more students were included.
4 Beyond the 35 states with full-time virtual schools, some states also allow other virtual education options, in
several alternative formats such as individual online classes, or supplemental online coursework, as full-time
blended models. These were beyond the scope of this research. Further, virtual programs as well as individual
class innovations that occur within districts and brick-and-mortar schools are also excluded from this study
becausetheyarenotclassiedas“schools.”
5 Estimates for 2000 to 2010 are based on two sources, the annual Proles of for-prot and nonprot education
http://nepc.colorado.edu/publication/virtual-schools-annual-2023
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