@article{hake1998,
  title={Interactive-engagement versus traditional methods: A six-thousand-student survey of mechanics test data for introductory physics courses},
  author={Richard R. Hake},
  year={1998},
  journal={American Journal of Physics},
  doi={10.1119/1.18809},
  url={https://doi.org/10.1119/1.18809}
}