There is a tendency for mobile and ubiquitous learning systems to be context-awareness as context provides valuable information that can be used for content or service adapted to the environment and the user. These systems are applied in both formal and informal contexts. In this study, we carried out a systematic mapping with the aim of providing a more updated panorama of the state-of-the art, identifying gaps and future works in mobile and ubiquitous context awareness learning systems, especially in characteristics such as the most used entities in the context, adaptation of content, extraction of user information and gamification strategies that have been applied in an informal context. Our results show that the location and the user's profile are the entities of the most used context; that the most used type of adaptation is the adaptation of educational resources; that the gamification strategies allow to improve the learning experiences in the informal contexts; and that there are several studies aimed to extract user's information indirectly.