From my experience, in elememtary I would have to say Mr.
Sketch(unscented). I have used this brand for the past 9 years. I like the
color assortment. But I do wish that they would make a grey !! Plus if a
kid snatches one, easier to tell they're mine (most kids don't buy Mr
Sketch, but they do have Crayolas in their desks !)
Mr. Sketch are long lasting, and I LOVE the white plastic tray you get in
the box when you order from a school supplier !!!! Keeps them organized.
I also use the Mr Sketch "Fiddlesticks" thin marker class pack. a great
deal and last for 2 school years.You have to teach them that skinny
markers are for small things and thin lines only. Fat markers for big
areas like skies.