By Dr. Marciene Mattleman

PHILADELPHIA (CBS) – Nearly 16% of American adults have no high school diploma and, with jobs requiring higher levels of education, getting that credential has become even more important. With new work expectations, the GED, the high school equivalency test, is changing.

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Since 1942, the GED has been updated three times – 1978, 1988 and 2002. But starting in January 2014, it’s a makeover and costs more – $120.

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Those planning to take the test, get ready – all tests will be administered on computers. A pilot by the GED testing service was encouraging, showing a much higher rate of success online.

There will be four sections: math, social studies, science and language arts, the latter a merger of reading and writing. Students will be given a maximum of 7-1/4 hours and will receive results within two to three hours. Scores on a separate set of indicators will address skills and competencies associated with college and career readiness.

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Read details and concerns in Education Week.