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There are some programs that took advantage of the No Child Left Behind Act. These businesses (Brainfuse Online Instruction, for example) help students improve their math and reading skills. This is done online with a "Whiteboard" interface. They prepare students for state assessment tests and help with any homework assignment the student may need help with.
In one program the students were from school systems. The students were tutored from a computer in their classroom. The students I tutored were from California, Colorado, and Chicago.
I have heard some controversy about "No Child Left Behind" in that not enough minorities were included. My experience has been that there is a near equal mix. I've had mostly Hispanic children, followed closely by Black children, then White children.