@article{和田_2009, 
  title={PG069 数量関係の理解を促す教授法に関する研究}, 
  volume={51}, 
  DOI={10.20587/pamjaep.51.0_679}, 
  number={0}, 
  publisher={The Japanese Association of Educational Psychology}, 
  author={和田}, 
  year={2009}
  }