Why do US school grades go A, B, C, D, and F. Why not "E"?
為什么美國學(xué)校的成績有 A,B,C,D 和 F ，唯獨(dú)沒有 E 躯喇？
原文地址：https://www.quora.com/Why-do-US-school-grades-go-A-B-C-D-and-F-Why-not-E
Robert Frost:
The modern letter grade system began at Mount Holyoke College in Massachusetts in 1897. The system was picked up by other schools and within about 20 years had become the norm across America. During this same period, immigration and mandatory attendance laws were resulting in more crowded schools and a higher student-to-teacher ratio. The letter system caught on with teachers because its simplicity made their job simpler as they became responsible for grading more students. Also at this time, it became more of a standard to report grades to parents, so a scale that was easy for parents to understand was desirable.
現(xiàn)代成績系統(tǒng)起源于 1897 年馬賽諸塞州的 Mount Holyoke 學(xué)院辫封。這套系統(tǒng)在隨后的 20 年內(nèi)傳播至其他學(xué)校直至整個美國。在這段時(shí)期，移民和強(qiáng)制性出勤法規(guī)導(dǎo)致了學(xué)生的激增和學(xué)生-教師比例的增大倦微。在面對大量的學(xué)生的情況下這套簡單的評分系統(tǒng)使得教師的工作更加輕松妻味，因此在教師群體中廣受歡迎。同樣也在這一時(shí)期璃诀，這也成為向?qū)W生父母匯報(bào)成績的新標(biāo)準(zhǔn)弧可，這樣一套方便易懂的標(biāo)準(zhǔn)對于父母而言同樣是令人滿意的。
Mount Holyoke defined their original scale as follows:
Mount Holyoke 學(xué)院是這樣定義成績的：
A Excellent, equivalent to 95-100%
A 優(yōu)秀劣欢，大致相當(dāng)于 95-100%
B Good, equivalent to 85-94%
B 良好棕诵，大致相當(dāng)于 85-94%
C Fair, equivalent to 76-84%
C 中等，大致相當(dāng)于 76-84%
D Passed, equivalent to 75%
D 及格凿将，大致相當(dāng)于 75%
E Failed, less than 75%
E 不及格校套，低于 75%
E was quickly replaced with F, because "F for failed" was more intuitive than "E for... excellent or failed?"
E 很快就被 F 所取代，因?yàn)椤癋代表 failed”比 E“excellent（優(yōu)秀）”更加合適牧抵。
