Students' fundamental motor skills are already developing when they begin kindergarten, but are not yet perfectly coordinated

Students' fundamental motor skills are already developing when they begin kindergarten, but are not yet perfectly coordinated. Five-year-olds can generally walk satisfactorily for most school-related purposes. For some at this age, running still looks a bit like a hurried walk, but usually it becomes more coordinated within a year or two. Similarly with jumping, throwing, and catching. ---- Whoever is responsible, it is important to notice if a child does not keep more-or-less to the usual developmental timetable.
A) From kindergarten to the end of high school, students improve basic motor skills, double their height and triple their weight.
B) Students who are clumsy are aware of how it could negatively affect their status among their peers.
C) Even if physical skills are not a special focus of a classroom teacher, they can be quite important to students themselves.
D) Failure in developing necessary motor skills generally results in poor self-esteem and traumatic experiences.
E) Assisting such developments is usually the job either of physical education teachers, or of classroom teachers.