@article{
  author = {Ashouri, Jamal, Saffarian, Mohammad Reza},
  title = {Comparing the effect of scaffolding, problem solving and traditional teaching methods on academic achievement of math courses},
  journal = {Journal of Instruction and Evaluation},
  year = {2014},
  volume = {7},
  number = {26},
  pages = {75-88},
  doi = {}
}