A state senator has a suggestion for creating more classroom space in Lower Manhattan, which by all accounts will continue to need it desperately: move the adults out of the Tweed Courthouse and convert the entire building into an elementary school.

Nearly 200 seats will be added to an elementary school planned for Lower Manhattan, city Education Department officials announced on Tuesday, but that additional space in a neighborhood that sorely needs it will not become available until 2015.

Faster than a student sprinting to class. Able to leap tall budget hurdles in a single bound. It’s a bird, it’s a plane, it’s a city teacher superhero! Available at a mobile device near you.

If the Tweed Courthouse is now home to New York City’s educational present, then the building directly across from it on Chambers Street is its memory. Part of the Municipal Archive is there, holding decades of the Board of Education’s records. That is where I went to track down one of the mysteries of the city school system: where did schools get their numbers?

Former school teachers and principals, political aides and the spokeswoman for two Congressional leaders are among the people in Chancellor Dennis M. Walcott’s cabinet.