Give a look at my today's lecture results https://santini.di.unimi.it/tmp/labprog/laboratorio_01/resul...
Using this software the teacher can have a valuable feedback on what exercises the students find easy, or difficult and, on the other hand, students become very competitive and get more productive than usual!
[The exercises texts, unfortunately in Italian only, are available here https://github.com/mapio/labprog-infomus]