This paper builds on the results of European research projects to support STEM education with online labs. We present Integrated Interaction Apps as a means to support learning activities centered on online labs. We then show how these apps, labs and other resources can be contextualized using Structured Learning Spaces , which follow templated layouts based on well-defined pedagogical scenarios. In order to extend the reach of initiatives exploiting these learning spaces, we propose a schema that allows them to be downloaded for offline access via a mobile device. Our schema empowers app designers to define how their apps should behave offline and handle the activity traces they generate.