I don't know if any of you have ever tried the Crayola Educational
Watercolor Mixing Set. The colors are very intense and since the students
have a limited palette, they can learn a lot about mixing colors. There is a
red-violet, red-orange, turquoise blue, regular blue, two yellows, and
black. I know that Dick Blick has them listed for $5.08. Not every company
sells them though.
I used to use the Prang watercolors for my students. However, the crayola
colors are much more intense. The only problem my students run into is
learning how to make the colors match the duller colors in the Prang sets if
they are more familiar with the Prangs. I don't know how lightfast they are
compared to the Prang sets though. I've only been using them for two years.
The kids seem to use less of the paint and enjoy the colors more. The
only challenge you'll have is getting the students to mix their own colors
because they will absolutely love the colors in the set.