@article{943170,
      author = {Custable, Wendy, and Reibel, Anthony R., and Twadell,  Eric,},
      url = {http://library.usi.edu/record/943170},
      title = {Proficiency-based grading in the content areas : insights  and key questions for secondary schools /},
      recid = {943170},
      pages = {1 online resource (312 pages)},
}