A new study may shine some light on why deaf and hard-of-hearing students tend to lag behind their hearing peers in math. The National Institutes of Health is giving the Rochester Institute of Technology’s National Technical Institute for the Deaf more than $2 million to test more than 1000 students. Researchers will spend four years trying to better understand how deaf and hard-of-hearing students learn math. They say the studies have suggested simply improving communication is not enough to level the playing field and hope this research will reveal the missing piece.