I have complained before about the influence of big spending on our own District’s Board races, but LA certainly takes the cake for this as described in this article:

Mayor spent millions on school board races

The situation is a little different. LA is a bigger political “market.” Also, the contributors are buying consideration from the city government as a whole and not from the school district necessarily. I particularly enjoyed the part of the article at the end:

<< "City contractors are obviously giving because the mayor is asking," Stern said. "It's a business decision. It's not because they're interested in the school board." Kaufman sharply disagreed, saying donors to the committee gave money because they're concerned about education. "They share the mayor's belief that we have to fundamentally reform our schools," he said. >>