Students in first-period classes at Green Hope High School in Cary worked under natural light Thursday morning after a Progress Energy outage left the school without power.

School officials said enough light streamed in from the windows to make it possible to continue the school day.

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Power was restored to the school about 9:40 a.m.

Officials said Davis Drive Elementary, Davis Drive Middle and Carpenter Elementary schools also dealt with intermittent power outages early Thursday. All power was restored by 10 a.m.