This is an arts integrated lesson which incorporates math lines, rays and angles with watercolor painting for upper elementary students. It contains 4th grade standards but may be adjusted for middle elementary through middle school students. This lesson is geared for the classroom teacher who desires step by step art instruction in a picture sequenced lesson. You can set specific criteria that you wish to be included in the understanding of lines, rays and angles. For teachers wishing to incorporate art into math lessons and make learning fun, this lesson is for you! It's sure to become a favorite of students! The finished art piece serves as an assessment instrument while evidencing student understanding of lines, rays and angles.