[docs] add NIPS2020

Author: tswsxk

README.md

@@ -14,10 +14,10 @@ Convenient interface for downloading and preprocessing datasets in education.
 
 The datasets include:
 
-* [KDD Cup 2010](https://pslcdatashop.web.cmu.edu/KDDCup/downloads.jsp) [[Analysis]](https://github.com/bigdata-ustc/EduData/blob/master/docs/KDD%20Cup%202010.ipynb)
-
 * [ASSISTments (2009-2010, 2012-2013, 2015, 2017)](https://sites.google.com/site/assistmentsdata/) [[Analysis]](docs/ASSISTments)
 
+* [KDD Cup 2010](https://pslcdatashop.web.cmu.edu/KDDCup/downloads.jsp) [[Analysis]](https://github.com/bigdata-ustc/EduData/blob/master/docs/KDD%20Cup%202010.ipynb)
+
 * [OLI Engineering Statics 2011](https://pslcdatashop.web.cmu.edu/DatasetInfo?datasetId=507) [[Analysis]](docs/OLI_Fall2011)
 
 * [JunyiAcademy Math Practicing Log](https://pslcdatashop.web.cmu.edu/DatasetInfo?datasetId=1198) [[Analysis]](docs/junyi.md)
@@ -40,6 +40,8 @@ The datasets include:
 
 * [MOOCCube](http://moocdata.cn/data/MOOCCube) [[Analysis]](docs/MOOCCube.md)
 
+* [NIPS2020](https://www.microsoft.com/en-us/research/academic-program/diagnostic-questions/)
+
 * [OpenLUNA](http://base.ustc.edu.cn/data/OpenLUNA/)
 
 Your can also visit our datashop [BaseData](http://base.ustc.edu.cn/data/) to get those mentioned-above (most of them) datasets.