In this article Dave Vernier describes how he turned the total eclipse on August 21, 2017 into a science, technology, engineering and mathematics (STEM) lesson by taking data. He asked teachers and former teachers to join in collecting data and to share it. The most frequently monitored parameters were illuminance (a measure of light brightness as perceived by human eyes, in lux) and irradiance (total solar radiation, in W/m[superscript 2]). UV levels, temperature, and other parameters were also measured. People from all over the United States sent data to Vernier. This article demonstrates some typical results from people in the zone of totality.