It is for all grades, however, you can't put bball or lacrosse in for 12th grade, since it is a spring sport. Putting in fall sports for 12 should be fine because most fall sports are already training.
Short answer is yes for the EC's and the community, because you would be a member of a group that dedicates time to the community. However, most people when they put the community group in the equation they also put in the amount of time they volunteered.