America's inner cities are third world slums. One major problem can be attributed to the fact that most of those students probably speak secondary or less English. I doubt they are very proficient in that regards.
And yes, the collapse of the family has plagued this nation. Look at the Leftist failure of Detroit; 80% of the children are born out of wedlock. But no, we don't need smart couples to get married and raise stable families. Let's have morons go around getting pregnant and bearing five kids to four different men.