The challenge that existed in the Fall of 2020 was not knowing exactly how students and teachers could adapt to a new way of teaching and learning amidst a world-wide pandemic. There has long been a debate over the effectiveness of online versus face-to-face teaching. The researcher found insufficient research so far has been done on the effectiveness of face-to-face and online learning on achievement scores in Reading and Math in elementary grades 1-8. The purpose of this quantitative research study is to assess the effectiveness of a synchronous way of learning utilizing the "©IOWA Assessment" as an instrument to examine the achievement scores for Reading and Math. The researcher has analyzed the relationship in student achievement scores in the disciplines of Reading and Math for students in elementary grades 1 through 8 that spent the 2020-2021 school year learning in-person, learning online or transitioned to in-person learning. A Three-way Factorial Analysis of Variance (3x2x2) with repeated measures ANOVA was conducted to determine if the students' performance would be different when comparing different subject factors. [The dissertation citations contained here are published with the permission of ProQuest LLC. Further reproduction is prohibited without permission. Copies of dissertations may be obtained by Telephone (800) 1-800-521-0600. Web page: http://bibliotheek.ehb.be:2222/en-US/products/dissertations/individuals.shtml.]