This document summarizes a study that investigated the relationship between online learning and critical thinking in an undergraduate online introductory computer literacy course. The study aimed to identify which parts of the course's learning modules (resources and activities) contributed most to developing students' critical thinking skills. A survey of 490 students found that interactive course components like assignments and projects were perceived to contribute more to critical thinking than static resources like textbooks. Assignments had the strongest perceived impact, followed by an Excel mini case project. Overall, results indicated students viewed interactive elements as contributing more to critical thinking development than non-interactive content, assessment, or projects. The findings suggest online course designers should focus on incorporating interactive elements to foster critical thinking skills.