This video reveals something bizarre. At about 1:10, Palin asks this obviously thoughtful woman what she does. She answers "I'm a teacher." Palin goes "Ohhh," rolls her eyes, and her and her daughter share an "Oh, that's what's wrong with her" look. Watch for yourself to see if I'm reading too much into it.
And the "Oh you wanted me to be your governor!" moment 10 or 12 seconds in is such incredibly pure slimy condescension I can feel it on my skin.
Shannyn Moore at HuffPo knows the woman in the shot.