look at (the) example(s)

• health -- BMI / heart rate / weight watch / BAC
• effect(s) -- fading(s) / rgb / wheel / banner(s)
• math -- function(s) / integer(s) / fraction(s) / equation(s) / challenge(s)
• calculator(s) -- area(s) / circle / volume(s) / prime(s) / function(s)
• game(s) -- memory / face(s) / react / invader(s) / poker / stop the clock
• explore -- example(s) / graphic(s) / jquery