Hi Ted, I’m no master my self but here my comments:
I think the best picture from the set is no 3.
pic 1) lovely sharpness and expression from little joker, it would have been a winner if the hat was all in the frame and his harm/hand wasn’t covering his face
pic 2) composition i think is there but her face doesn’t seems to be very sharp. her shoulder seems ok.. so maybe is a matter of spot focus or small aperture..( i leave that to the experts) maybe photoshop could help
pic 3) the sky is a bit too bright but i like the picture.
pic 4) from composition point of view the girl is half cut and there is a big black object in the way
pic 5) taken from behind doesn’t make the subject very interesting imho.