Academic libraries devote considerable human resources in delivering library instruction programs. This study attempts to determine if these instructional efforts have any measurable effect on student performance in terms of overall grades. Library workshop attendance and graduation GPA of over 8,000 students was analyzed at Hong Kong Baptist University. It was found that, if more than one or two library workshops were offered to students within the course of their program, there was a higher tendency of workshop attendance having a positive impact on final GPA. The results indicate that library instruction has a direct correlation with student performance, but only if a certain minimum amount of instruction is provided.