Competitions are held:  http://www.schools.utah.gov/cte/ag.html January 28:   Christa McAuliffe Day commemorates high school teacher who was 1 of 7 astronauts killed on the space shuttle Challenger in 1986. KUED Channel 7:   NOVA moves to Wednesday nights at 8 p.m. this month beginning with Making Stuff, a four-part material science series