I was for many years.
During that time, I worked odd jobs (including writing articles, babysitting, and cleaning houses) and I became very adept at economizing. It would not have been worth it for me to go to work and stick the kids in day care. That and I really like kids... especially my own little buggers.
During that time, I was very active as a volunteer at my children's schools. I even took a job as a teacher's aide when my two oldest were at the same school (one in 5th, one in K). I was planning to get a teaching job after that, but then I became pregnant with my son and had to stay home for four more years.

Since my kids are all 6 years apart, it's been interesting. I like to joke that every time I sent one off to K, I got pregnant with another, until we figured out what was causing them.
Now they are all school age and I work as a teacher at my neighborhood school. I'm very happy to have done things this way.