If the reader wants to know the details of DKT, please refer to the Appendix of the paper: Deep Knowledge Tracing.
@article{piech2015dkt,
title={Deep Knowledge Tracing},
author={Piech, Chris and Spencer, Jonathan and Huang, Jonathan and Ganguli, Surya and Sahami, Mehran and Guibas, Leonidas and Sohl-Dickstein, Jascha},
volume={1},
pages={505--513},
year={2015},
publisher={NeurIPS: Los Angeles, CA}
}