  With the rise of the popularity of Bayesian methods and accessible computer
software, teaching and learning about Bayesian methods are expanding. However,
most educational opportunities are geared toward statistics and data science
students and are less available in the broader STEM fields. In addition, there
are fewer opportunities at the K-12 level. With the indirect aim of introducing
Bayesian methods at the K-12 level, we have developed a Bayesian Data Analysis
activity and implemented it with 35 mathematics and science pre-service
teachers. In this manuscript, we describe the activity, the web app supporting
the activity, and pre-service teachers' perceptions of the activity. Lastly, we
discuss future directions for preparing K-12 teachers in teaching and learning
about Bayesian methods.
