Evaluation Insights is a new column about program evaluation that will help readers build their capacity as program evaluators.

Mobile instructional spaces such as retrofit buses, customized trucks or trailers, and repurposed shipping containers are innovative, unique venues for teaching and learning. STEM-focused mobile instructional spaces have emerged as vehicles for providing students and teachers with high-quality integrated STEM learning experiences that emphasize professional practices and 21st-century skills alongside a range of STEM content. In this article, we describe three best practices (creating a shared culture, fostering agency, and offering multiple pathways for engagement) for operating a STEM-focused mobile instructional space with K–12 students and teachers. We developed these best practices based on our own extensive work with two STEM-focused mobile instructional spaces, the BioBus and the MakerTruck. These practices have the potential to inform the work of formal and informal STEM educators who also operate mobile instructional spaces. Next steps for cementing the unique role STEM-focused mobile instructional spaces play in bridging the gap between in-school and out-of-school learning are discussed.

A material commonly known as Flubber, with properties that are excellent for teaching about glaciers, has been widely used in geosciences education. Yet, the original recipe contains borax, which has health risks that should be avoided. A new recipe is shared containing low-cost, readily available ingredients that produces a reformulated Flubber with properties similar to the original without the associated health risks.

Through the Sediment, Ice, & Learning on the Tanana (SILT) project, a team of university scientists engaged two middle school student groups in testing innovative environmental research technologies to measure sediment flowing underneath river ice. The culturally responsive, place-based pilot program tests these technologies as a strategy to increase students’ science interest and science self-efficacy. Over a series of three workshops, 39 students built and deployed low-cost turbidity sensors to measure sediment flowing underneath river ice and designed model payload attachment systems to attach the sensors to drones for measuring sediment fluxes during spring river ice breakup. Students’ changes in science interest and self-efficacy were measured using both a true pre- and post-program survey and a retrospective pre-program survey.