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Teacher giving a lecture in a classroom and writing math formulas on the board

Stock Photo:
Image ID: 106224509
Release Information: Signed model release filed with Shutterstock, Inc
Copyright:
Small
500x436 6.9"x6.1" (72dpi) 169 KB
Med
1000x871 3.3"x2.9" (300dpi) 564 KB
Large
2658x2315 8.9"x7.7" (300dpi) 2.0 MB
Super
5316x4630 17.7"x15.4" (300dpi) approx.5.3 MB
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