Severance agreement arrived, need a second opinion (Knoxville)

I was offered 15 weeks of severance after 15 years as a school bus driver, and I have a few days to sign. I have read a lot of threads here and could not find my exact situation. I do not want to leave money on the table. What did you ask for?

Ask for the offer in writing and do not sign on the spot. A day or two to think is normal.