All proposals are evaluated and refereed by the various Interest Sections (IS), so it is imperative that you submit your proposal to the appropriate IS. To help you decide which IS best suits your proposal, peruse the interest sections on TESOL’s Web site
The Nonnative English Speakers in TESOL strengthens effective teaching and learning of English around the world while respecting individuals' language rights
Relate your description to the convention theme for 2012: A TESOL Declaration of Excellence
How does your proposal “ declare [your] vision of excellence in all aspects of the profession ” ? (…) “ This year participants are invited to reflect on their practices, voice their opinions, and declare their pursuit of excellence in the ELT profession . ”
Wait to write the abstract until AFTER the session description has been written. You can then identify the main points of your proposal in 50 words. Remember that most convention participants will decide on whether or not to attend your session based on this information.