Automatic Anti-Virus and Windows Updates

I work for a local school district as a technology assistant. I had all computers set up for automatic updates for both windows and anti-virus programs. Our teachers have enough worries without having to perform this simple chore everyday. However, we have certain personnel in our central office who want the teachers to be responsible for their classroom computers to include doing all updates manually. I am just curious as to what the real world is doing in their businesses. Are you setting up your computers for automatic updates or requiring each PC user to responsible for updating their own computers?