Good but could be better
For second and third best-hands games, it would reinforce the teaching aspect to have the option to show what the higher hands would be: for example, for second best hand it could offer to show wha the first best hand was... Add this and this game is easily worth the money.
Also, I agree with the other comments that this does not represent what would happen in "true hands" for second and third nuts. Making this change would also improve the teaching aspect in that players would be learning yo identify hands rather than card progressions.
MickRak about
Find The Nuts: Texas Holdem Trainer