some more studies from Bauhaus.de
part of
Johannes Itten's preliminary course
Friedl Dicker, Light and dark study, c. 1920, composition and color
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Monika Bella Broner, Contrast study, 1929/30, pencil and gouache, shreds of fabric
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Balance study, 1924, wood and metal parts, reconstruction 1967
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Frieda Kessinger, Color angles and elementary color relations, 1929/30
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Lena Meyer-Bergner, Inter-penetration. Three colours in one form, watercolor, 1927
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Info about the instructors for each category of study
(material study, light/dark study, etc.)
can be found at the link above