Bests & Worsts Reviews from Amazon

I'm a teacher and get tired of my first graders drying out their dry erase markers. I have bought these Crayola dry erase crayons before in the regular colors. I like them except that they break quite easily when pushed on too hard. The pack of regular colors had a yellow crayon that didn't show up well on white boards, so I decided to try this set this time. Unfortunately, this set has a brighter yellow that doesn't show up and also a white crayon, which is pretty much useless unless you have a black board. So only 6 out of 8 of them are useful to me. I uploaded a picture to compare these bright colors with the regular colors.