Visit the Teachers College: Pioneering Education Through Innovation exhibit at the New York-Historical Society to commemorate the 125th anniversary of Columbia University's Teachers College. The exhibit includes photographs, documents and artifacts from the graduate school, which is the oldest in the country. 

Adult tickets are $15. Seniors, educators and active military can get in for $12, student tickets are $10, and tickets for children from 5- to 13-years-old are $5. Children 4-years-old and younger enter for free.

Admission is pay-as-you-wish from 6 to 8 p.m. on Fridays.