Sometimes second graders have their own language, and sometimes the create their own meaning for "grown up" topics. I am thinking of compiling a dictionary so everyone who is not involved with second graders is sure to understand this unique language. If you are involved in kindergarten, first, and perhaps third, you might already be proficient in "second."
Here are two entries I am considering:
Graduate School - "The school you have to go to before you are allowed to get married."
Opposed to - something you are required to do. Example: "Are we opposed to put away our math books when we are finished?"