Splish Splash Splatter: The Longest Line Drawings Great integrated lesson for math and art. Not only focus on lines, but colors (you could do warm/cool colors or tints and shades or ...). Students could draw different polygons with certain characteristics.
Jamestown Elementary Art Blog: 1st Grade Dali Birds.. Warm/cool colors.. Blending paint
Jamestown Elementary Art Blog: Fifth grade Georgia Okeeffe clay flowers
Jamestown Elementary Art Blog: Reporting... Fifth grade Freidrich Hundertwasser architecture
Project ART-A-DAY: Lesson: Bad Hair Day (Line and Shape)
Jamestown Elementary Art Blog: Kindergarten Rainbow Order Stars
Study of line, pattern, color and overlapping. Could do with other items as well -- pencils, ribbons, etc