ROMAS of BLUE. " "
yellow-red.
8. THREE CHROMAS of PURPLE. " "
green-yellow.
9. Arrange five middle hues in circle, described as on the surface
of the Color Sphere (middle chroma), with weaker chromas inside,
and stronger chromas outside, the sphere.
10. Review,--to find these sequences of chroma in nature and art.

_Aim._--To recognize sequences combining three chromas, middle value,
and ten hues. To name, match, imitate, and arrange them.

_SIXTH GRADE LESSONS._

1. Review sequences combining three chromas, five hues, and middle
value.
Find on Color Tree, name, match, imitate, and arrange them.
2. THREE CHROMAS of LIGHTER and DARKER RED. Compare with middle red.
3. Write " " " " as a fraction,
chroma under value, using 3, 5, and 7. Thus R 5/7.
4. Find CHROMAS of LIGHTER RED, and compare with darker blue-green.
5. THREE CHROMAS of LIGHTER and DARKER YELLOW, with purple-blue.
6. " " " " GREEN, " red-purple.
7. " " " " BLUE, " yellow-red.
8. " " " " PURPLE, " green-yellow.
9. Colors in nature and art, defined by hue, value, and chroma.
Named, matched, imitated, written, and arranged by Color Sphere
and Tree.
10. Review,--to find sequences combining three chromas, five values,
and ten hues.

_Aim._--To recognize sequences of chroma, as separate from sequences
of hue or sequences of value. To name, match, write, imitate, and
arrange colors in terms of their hue, value, and chroma.

COLOR EXPRESSION IN TERMS OF THE HUES, VALUES, AND CHROMAS.

_SEVENTH GRADE LESSONS._

1. Review sequences of hue (initial), value (upper numeral),
& chroma (lower numeral).
2. " " " "
3. Exercises in expressing colors of natural objects by the NOTATION,
4. and tracing their relation by the spherical solid.
5. REDS in Nature and Art, imitated, written, and traced
by the spherical solid.
6. YELLOWS in Nature and Art, " "
by the spherical solid.
7. GREENS in Nature and Art, " "
by the spherical solid.
8. BLUES in Nature and Art, " "
by the spherical solid.
9. PURPLES in Nature