Welcome to the board!
I'm MichaelAnn our cl here. I have two children, 11 and 8 and started back to school 2 years ago as a freshman at community college after being a stay at home mom for 10 years. I'm a science major with the ultimate goal of teaching 4-8 math/science.
Juggling...well, after two years I still haven't really got the hang of it. My best advice, is with kids the ages that your are, they can help A LOT. My 11 year does all the dishes, garbage, vacuuming, cleans the kids bathroom, etc. My 8 yr old feeds/waters and cleans up after the pets plus does general picking up in the living room and game room. They both do all their own laundry. That really helps a lot. We made a schedule on a big dry erase board in the kitchen (my husband and I have our chores listed on it too) It doesn't always get done, but at least when things aren't done, its easy to see WHO was supposed to responsible for what.
I also make sure to schedule plenty of time while the kids are in school for homework. I try to go either MWF or TTH so I have 2-3 days home alone to focus on homework.
Its tough, I have had many breakdowns over the last two years, and its tough to know I have another 4 years of this (or more if I want to go higher than my BS, which I'm sure I do) But I am also very glad I am doing it so that I won't spend the rest of my life wondering "what if."