Martin Haemmig speaks English, German and French at a proficient level.

马丁。汉明博士精通英语，德语和法语。

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The goal is for all students to perform at the proficient or advanced level.

VOA: special.2011.02.03

However, by the time they reach middle school, only 32% are at or above a proficient level in math, according to the 2007 Nation's Report Card by National Assessment of Educational Progress, and they fall behind internationally.

FORBES: Magazine Article

The average scores were categorized at each grade level into four groups: below basic, basic, proficient, and advanced.

CNN: Report card shows U.S. students need to improve math skills

By third grade, children from low-income families who are not reading at grade level are six times less likely to graduate from high school than students who are proficient.

WHITEHOUSE: The White House