Abstract
As a consequence of the technological advances and the widespread use of mobile devices to access information and communication in the last decades, mobile learning has become a spontaneous learning model, providing a more flexible and collaborative technology-based learning. Thus, mobile technologies can create new opportunities for enhancing the pupils' learning experiences. This chapter presents the development of a game to assist teaching and learning, aiming to help students acquire knowledge in the field of geometry. The game was intended to develop the following competences in primary school learners (8-10 years): a better visualization of geometric objects on a plane and in space; understanding of the properties of geometric solids; and familiarization with the vocabulary of geometry. Findings show that by using the game, students have improved around 35% the hits of correct responses to the classification and differentiation between edge, vertex, and face in 3D solids.

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Fraunhofer AICOS, a research and development institute, and University of Porto made a joint venture with Mandela Metropolitan University and Eduardo Mondlane University in order to establish a set of guidelines based on an extensive research and experimental fieldwork to answer more efficiently to a user-centered design approach and focus on different users and different usage contexts. Those guidelines and this chapter provide recommendations to cope with cultural diversity, illiteracy, oral-based cultures, ergonomic factors, digital interface design, and social and environmental constraints, helping to understand problems and define strategic design actions in order to develop more user-centered solutions, focus on users' needs and expectations regarding their cultural, environmental, and technical contexts.

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