Providing PowerPoint Slides prior to class has an adverse impact on performance of students.
@GrahamCLDavey: "Students with a consumer mindset do less well! Remember students, you're buying an "opportunity" to learn, not buying a degree!"
A higher consumer orientation in students is associated with lower performance.
Attending class has strong relationship with class grades. Mandatory attendance policies appear to have a small positive impact on average grades, so not mere correlational.
Students sitting on rows near the front during class perform better in examinations. Again, not just correlational evidence: "When students are randomly assigned seating location those seated towards the front achieve higher grades."