The word “rigor,’’ is one of the new buzz words in education, used to describe everything from stringent new graduation standards many states are adopting to advanced placement courses that give college credit to high school students. Lately, the word has crept into the pre-k lexicon with little explanation.

In Washington D.C., for example, pre-kindergarten is about to get a lot more rigorous, according to a Washington Post article.

And…what exactly does that mean?

Earlier this week, the article points out, the D.C. Council committee unanimously approved legislation that would “increase the rigor of the curriculum for early childhood education throughout the city.’’ A quick google search found the term creeping into the pre-k conversation throughout the U.S.

The Post article did a fine job of describing some of the hurdles to expanding pre-kindergarten in the District of Columbia, where about 12,000 children are enrolled and another 2,000 or so are not being served. However, it did not question, examine or explain what a “more rigorous.’’ program would look like.

Shakespeare instead of sand box play? Early SAT preparation? Pre-pre-calculus? Degree requirements for teachers? The question really should be, does the program reflect high standards? And what does that mean? What is the student teacher ratio, for example? Is there a curriculum? What are kids expected to know and do?

Journalists – and the public – should challenge words that don’t say a lot. The next time a pre-k program promises to be “rigorous,’’ find out what it means.