Recent advances in mobile and wireless communication technologies have enabledvarious new learning approaches which situate students in environments that combinereal-world and digital-world learning resources; moreover, students are allowed to shareknowledge or experiences with others during the learning process. Although such anapproach seems to be promising and innovative, researchers have indicated severalproblems when applying it to practical applications, in particular, the lack of properstrategies or tools to assist the students to learn collaboratively in such a learning sce-nario with abundant content. Students might feel interested when using the mobiledevices to learn; however, without proper assistance or guidance, their learning achieve-ments are usually disappointing. To cope with this problem, this study proposes aconcept map-oriented Mindtool for collaborative ubiquitous learning. Experimentalresults from a natural science course in an elementary school show that this approachnot only enhances learning motivation but also improves the learning achievements ofthe students.