Arrowsmith, H. E., G. W. Houchens, T.-A. Crossbourne-Richards, J. L. Redifer, J. Zhang, and A. D. Norman. “Operationalizing and Measuring Personalized Learning in K-12 Schools: Development and Implementation of an Innovation Configuration Map”. International Journal of Education Policy and Leadership, vol. 17, no. 3, May 2021, p. 16 pp, doi:10.22230/ijepl.2021v17n3a977.