The Electronic Classroom of Tomorrow, an online charter school based here, graduated 2,371 students last spring. At the commencement ceremony, a student speaker triumphantly told her classmates that the group was “the single-largest graduating high school class in the nation.”
What she did not say was this: Despite the huge number of graduates — this year, the school is on track to graduate 2,300 — more students drop out of the Electronic Classroom or fail to finish high school within four years than at any other school in the country, according to federal data.