Kabel, Matthew, Jiyung Hwang, and Jiwon Hwang. 2021. “Lessons Learned From a Rural Classroom Study: Transitioning From Concrete to Virtual Manipulatives to Teach Math Fact Fluency to Students With Learning Disabilities”. Journal Of Curriculum Studies Research 3 (1), 42-68. https://doi.org/10.46303/jcsr.2021.7.