@article{
  author = {Ebrahimi-dolar, Somayeh},
  title = {Improving second grade students' understanding of addition and subtraction of three-digit numbers using a technical method (an experiment based on lesson study)},
  journal = {Transcendent  Education},
  year = {2024},
  volume = {3},
  issue = {4},
  pages = {107-125},
  doi = {},
  url = {https://sanad.iau.ir/fa/Article/923767}
}