Your teacher would have hated me - when I was 8 I spent a few weeks at my aunts while my parents went out of town one summer. My older cousin read me "The Black Cat", "The Fall of the House of Usher", "The Tell Tale Heart", "The Raven", "Anabell Lee" and I believe "The Bells" as BEDTIME stories.
I loved it. And had The Raven memorized by the time my parents picked me up. My mom was impressed.
My mom let me watch movies when she thought I was ready. I saw the Sixth Sense in theaters when I was 10 or 11 and was fine. If she wasn't sure, she watched it first and then decided. Or read a detailed description.
Books were the same way. As long as it didn't contain graphically detailed sex scenes I could read whatever I wanted. (And that rule was mostly because I was like 9.)