Virginia Escobar-Cheng teaches a science class at a high school in Homestead, Florida, in March.

Schools throughout the country are grappling with teacher shortage, data show

Updated 1745 GMT (0145 HKT) August 21, 2017

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(CNN)Lynn Sorrells started teaching 26 years ago because she loved seeing the light-bulb moment when a kid grasped a new concept.

She still does. But as principal of a high school in Dorchester County, Maryland, she is struggling to find an algebra and geometry teacher just weeks before her school year is set to begin.
As students head back to school, Sorrells' district is one of hundreds across the country grappling with a growing teacher shortage -- especially in key areas such as math and special ed.
"Currently, there are not enough qualified teachers applying for teaching jobs to meet the demand in all locations and fields," said the Learning Policy Institute, a national education think tank, in a research brief in September.
Some schools, such as in New York City, are being forced to increase class sizes, which some studies show can reduce how much a student learns.