Class is in Session - how much have you forgotten since grammar school? Step up to the podium and put your smarts on the line to see if you're smarter than a 5th grader! Jump right into the game show action with Are You Smarter Than A 5th Grader?
Most popular community and official game content for the past week.  (?)
What does popular mean?
It means the content you're seeing has been rated up more than it has been rated down for the given time period.