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Matthew Greene, a popular math teacher at the school 65 …

Matthew Greene, a popular math teacher at the school 65 …

Popular Pa. teacher vanishes in Calif. wilderness Matthew Greene, a popular math teacher at the school 65 miles north of Philadelphia, vanished while on a backpacking trip in California last month. Police say Greene was there to hike and climb the Eastern Sierra, a region that features extremely steep and rugged terrain, with many peaks […]