United Federation of Non-Teachers

3) United Federation of Non-Teachers. The United Federation of Teachers in New York City celebrated surpassing the 200,000 member mark, with the induction of 28,000 home day care workers in a recent union authorization election. This makes UFT the largest union local in the nation.

The breakdown of the 201,486 members is interesting, though. Others have already noted the effect on policy of UFT's 54,000 retired members, but it's more eye-opening to see that only 118,000 (58.6%) are "in-service educators."

With enrollment falling steadily in New York City, it's conceivable we could see a future where working K-12 teachers are a minority in their own organization.