Here are some options I have heard about to earn University Credits. Please be sure to check with your HR person to be sure these will move you over on the pay scale.
Making Math Moments that Matter Workshops
These are 12 week workshops where you can earn 2-4 hours of credit. See site for details and dates (scroll all the way to the bottom for the question on the right.)
Making Math Moments that Matter Workshop: Credits through Brandman University