Using an instructional aid in teaching Mathematics is important in simplifying the abstract concepts behind numerical expressions. This study determined the effectiveness of using a conventional whiteboard in teaching Probability and Statistics online. It was conducted in the Senior High School Department of Misamis University, Ozamiz City, from 2021-to 2022. Quasi-experimental research, specifically the matching pretest-posttest control group design, was used. The respondents were 40 senior high school students from the Humanities and Social Sciences (HUMSS) Grade 11 classes, with 20 students each for the experimental and control groups. They were selected through a purposive sampling technique. Mean, standard deviation, and t-test were utilized as statistical tools. Findings revealed that before using a conventional whiteboard and PowerPoint presentations as instructional aids, both control and experimental groups had low pretest performance. After implementing the interventions, both groups showed a significant increase in their posttest performance. There was a statistically significant difference in the posttest performances between the control and experimental groups, which revealed that using a conventional whiteboard in teaching probability and statistics led to higher student performance than with PowerPoint presentations. Hence, a conventional whiteboard is a more efficient teaching tool that aids students in effectively learning Probability and Statistics.