Students often memorize the definition of a transcriptional promoter but fail to fully understand the critical role promoters play in gene expression. This laboratory lesson allows students to conduct original research by identifying and characterizing promoters found in prokaryotes. Students start with primary literature, design and clone a short promoter, and test how well their promoter works. This laboratory lesson is an easy way for faculty with limited time and budgets to give their students access to real research in the context of traditional teaching labs that meet once a week for under three hours. The pClone Red Introductory Biology lesson uses synthetic biology methods and makes cloning so simple that we have 100% success rates with first year students. Students use a database to archive their promoter sequences and the performance of the promoter under standard conditions. The database permits synthetic biology researchers around the world to find a promoter that suits their needs and compare relative levels of transcription. The core methodology in this lesson is identical to the core methodology in the companion Genetics Lesson by Eckdahl and Campbell. The methods are reproduced in both lessons for the benefit of readers. The two CourseSource lessons provide the detailed information needed to reproduce the pedagogical research results published in CBE - Life Sciences Education by Campbell et al., 2014.