Observation competence plays a fundamental role in outdoor scientific investigation. The computerized concept mapping technique as a Mindtool has shown the potential for enhancing meaningful learning in science education. The purposes of the present study are to develop a concept map integrated mobile learning design for ecology observation and to examine the implementation effect for elementary school children. Also, the difference in growth slopes between gifted and average students is investigated. Eighteen gifted students and thirty average students were included in this study. A computerized dynamic assessment system which combines a Computerized Ecology Observation Competence Assessment (CEOCA) and a concept map integrated ecology observation learning design were implemented. The results of the hierarchical linear model (HLM) analysis reveal that the overall growth slope is significant ([mu] = 0.27, p less than 0.01). The effect size is 0.53. The growth slope of the gifted students is a little higher than that of the average students. However, the slope difference between ability groups is not significant. The results suggest that a well designed concept map integrated learning system demonstrates very promising potential for enhancing both the gifted and average students' mobile observation competence. The system developed in this study could be a useful resource for elementary school outdoor learning design. (Contains 4 figures and 7 tables.)