In Boston, fellow students have held memorial gatherings for Lu at the math department and at a campus chapel.

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By law, the U.S. Department of Education gives the math and reading tests to a representative sample of students in every state biennially.

WSJ: City Schools Gain in Reading, Math

Math game developer Sokikon, for example, references U.S. Department of Education-funded research correlating its games to progress in test scores and motivation to learn math (up to 15% improvement in one Arizona classroom).

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New student test scores released by the U.S. Department of Education last week showed that Washington's fourth-graders made the largest gains in math among big city school systems in the past two years.

WSJ: D.C. Schools Chancellor Michelle Rhee Is Getting Results