1 or 2 days a week job?

Ok, so I am working part-time 3 days a week for $15 per hour, and soon I will be going to school for 6 weeks, 3 days a week. My husband is trying to support me while I do this, but honestly we are not really making it… we have 2 kids and we just aren’t brining in enough money… he thinks it will be ok but we have just lucked out so far in being able to pay our bills. I need to find some sort of job that may only be only 1 or 2 days a week that would make me a couple extra hundred dollars. Do you have any ideas?