Chicago Teachers Union and school district reps sounding more upbeat than they have since a strike started on Monday.

FOX News Radio's Jennifer Keiper reports from Chicago:

Both sides say they've made significant progress. School Board President David Vitale says there has been lot of back-and-forth on significant issues including teacher evaluations. While Vitale is hoping that kids can start school tomorrow, Teachers Union President Karen Lewis thinks that is highly unlikely.

(Lewis) "The House of Delegates will not vote on one part of this. So the key is that we really do have to have a comprehensive package for our House to look at and decide on."

Lewis, back in talks today, says there is still a lot on the table to work out.

In Chicago, Jennifer Keiper, FOX News Radio.