Technology has become an inseparable part of everyday life, as we use it at home, at work, in school etc. For education, technology is frequently used as a tool to support classroom-based learning. However, an emerging challenge is the application of technology, beyond the traditional classroom, to a diverse mix of pedagogical techniques. Traditional education is based on the process of transmitting knowledge; however, it is necessary for education to encourage the formation and strengthening of skills such as creativity, innovation, analysis, communication and other capabilities that are important aspects of professional life. This paper extends our previous work towards developing an InterReality Portal learning environment. The InterReality Portal applies Problem-based Learning (PBL) pedagogy and co-creative learning to the realization of mixed-reality laboratory activities for learning computing. To reach this goal we propose a series of structured lab activities created using IMS Learning Design, with a combination of Cross-Reality (xReality) and Virtual objects, to produce Internet-of-Things-based computer projects using collaborative interaction between geographically dispersed students.