As students, instructors, and higher-education administrators delve further into cyberspace, scholarly literature and practice require further insights into the dynamics of online learning. This study examined the relationship between online student discussion-board activity and student grades and, consequently, addressed a dearth in the literature about this relationship. Student Involvement Theory provided the theoretical foundation of this research. This study's sample consisted of 200 online undergraduate students in online business-analytics courses. Regression-analyses findings supported the relationship between student postings of certain mathematical-symbol references (e.g., for equalities, inequalities, addition, subtraction, multiplication, and division) and student grades. Therefore, administrators, faculty, and course designers should consider the use of text-based discussions for all courses, online, traditional, and hybrid. [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://www.proquest.com/en-US/products/dissertations/individuals.shtml.]