Sue says, "I'm not an American citizen. I was born in the Panama Canal zone. But I managed to get a passport. And run for office twice." This is a reference to Arizona Senator John McCain, who was born in the Panama Canal Zone and who ran for the presidency of the United States in 2000 and 2008.
When Terri walks into the teachers lounge at 9:30, it is clear that she is wearing a fake baby bump. This is indicating that her baby bump is fake, but Mr. Shue and others do not notice.
The exterior Cheerios formation sees the girls wearing the "old" style of skirt (solid skirts, not the cut pleats).