There is evidence this is happening in several places--from helping small, rural or low-wealth schools where specialized courses would not otherwise be available to serving students who need special tutoring, or for whom attending the normal school day is not an option.

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After a school shooting, students may be reluctant to return to classes and resume their normal academic life, experts say.

CNN: Finding 'new normal' after school shooting

In Los Angeles, the nation's second-largest district, the first school bell rang for 600, 000 students on Aug. 14, three weeks earlier than the normal start.

WSJ: School in August Gets Low Grades