The current research aims to measure the effectiveness of employing motivational designed e-learning attitudes to develop achievement in computer science curricula for optimal investment students. To achieve the aim of this research, a tool was built to measure the dependent variable, which was an achievement test. The researchers also used a learning management system, Blackboard, to employ motivationally designed electronic learning situations. The current research relied on the experimental approach with quasi-experimental designs to reveal the relationship between the independent variable (electronic educational attitudes based on the motivational design model) and the dependent variable (cognitive achievement). This is done through the application of (60) students from the optimal investment students at the College of Education at Najran University studying the computer science curricula. They were randomly divided into two groups (experimental and control), each of which consisted of (30) students. The results revealed a statistically significant difference between the two research groups in cognitive achievement in favor of the experimental group.