The 2011 data was released Thursday by the National Assessment of Educational Progress, also known as the Nation's Report Card.
It shows Utah's eighth grade science scores improved among all ethnic groups measured, across income levels, and among both sexes.
The overall percentage of Utah students who are at or above basic levels in eighth grade science rose from 72 percent in 2009 to 77 percent in 2011.
North Dakota, Montana, Vermont, New Hampshire and South Dakota topped Utah's average score. Colorado, Massachusetts, and Minnesota tied it.
The lowest performing states were Mississippi and the District of Columbia.
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