We use the Spectra series in our K-8 district at our 4 elementary schools.
I've found it to have fair slides, although the quality of the color is often
very poor. They include work of well-known artists and also student examples.
There's also occasionally some good background information. I like the way
the series is set up to encourage students' talking about art. I'm not crazy
about many of the lessons, however. We use it more as an additional resource
than our basic curriculum.
Art Curriculum Chair
Deerfield School District, Deerfield, Illinois