34,615 studies

60,774 studies

64,445 studies

78,110 studies

969,951 studies

43,175 studies

55,551 studies

114,182 times of learning

34,493 learning sessions

47,847 studies

26,172 studies

33,917 studies

15,338 studies

20,340 studies

42,808 times

37,670 studies

29,586 studies

16,391 studies

19,814 studies

12,701 studies

16,712 studies

10,152 studies

6,472 studies

Zero learning

901 studies