The poster will describe results from the NSF-funded High-Adventure Science: Earth's Systems and Sustainability project. The project developed five online curriculum modules that promote understanding of how human actions affect the mechanics of some of Earth's systems. The five modules each focus on a single topic: climate change, fresh water availability, air pollution, land management, and energy choices. The curricula include interactive computational models and real-world data. Computational models are used as a way to help students more deeply explore complex Earth systems and the human impact on those systems. The real-world data present an opportunity to engage students' scientific analysis and reasoning skills on a topic of current interest in Earth Science.

We created and validated an assessment framework that measures students' formulation of uncertainty-infused scientific arguments with real-world data and modeling. Since students are not naturally inclined to consider uncertainties in their scientific arguments, we developed a four-part scientific argumentation prompt that includes: (1) a multiple-choice claim, (2) an open-ended justification to support the claim, (3) a five-point Likert scale uncertainty rating, and (4) an open-ended explanation of the reasons for their uncertainty rating. We used these prompts in pre-post assessments of students' scientific argumentation abilities as well as embedded in curricular activities. Analyses show statistically significant improvement of scientific argumentation abilities across all five curriculum modules, as well as further gains when multiple modules are used.