Art and science share several significant practices. Both involve exploration. Both use experimentation. Both endeavor to discover. And both share the act of careful observation. Observation is a concentrated study requiring attention to the characteristics of an object, a scene, or a situation: light, shape, texture, pattern, color, detail, and changes of these over time and under varying conditions. As with any skill, the ability to observe well takes constant practice. In this article, the author, a scientific illustrator, describes a workshop she taught for a professional development program on biodiversity hosted by the Smithsonian Science Education for Teachers. In the workshop, she introduces K-12 teachers to scientific illustration. The experience was not about learning how to draw but to practice visually recording what one observes, both accurately and without judgment. Variations on these exercises are encouraged based on grade level, but they will work for any age given a few minor adjustments.