@article{361029,
      author = {Checkley, Kathy.},
      url = {http://library.usi.edu/record/361029},
      title = {The essentials of mathematics, grades 7-12 effective  curriculum, instruction, and assessment / [electronic  resource] :},
      publisher = {Association for Supervision and Curriculum Development,},
      recid = {361029},
      pages = {xi, 128 p.},
      address = {Alexandria, VA :},
      year = {2006},
}