That isn't how you train your bridge officers with the level 3 skills. Look on the status page for your character where it has all your equipped gear... along the bottom is a button that says "Train" or "Training"... something like that.
Note: I think I've seen some people report that you can't train BO's of a different discipline. If you're a Tactical officer, you can only train your Tactical bridge officers. I haven't verified this though.
EDIT: The button is labeled "Train Officer" and it's right next to the drop down for your title and where you set your biography.