These are great examples of a skill anaylsis. For the soccer throw in, your advice to throw stronger and further is good, however, she may need more direction then just taking a run start or more steps. You could also tell her to step closer to the side line, snap her arms forward over her head when throwing, and arching her back to increase the range of motion for a stronger throw. I think the basketball analysis was absolutely right, and you gave her great advice.