Digital technology is an important factor for thedevelopment of modern education systems, especiallythe wireless communication technology and the sensortechnology, which make the evolution of learningenvironments from web-based learning to mobilelearning or ubiquitous learning. In this paper, acontext-aware ubiquitous learning environment whichutilizes mobile devices, sensors and wireless networks to conduct situated learning. Moreover, a series oflearning activities of a butterfly ecology unit of the natural science course for K-4th students has beendeveloped and conducted in the learning environment,in which students are guided to observe real-worldobjects with personalized supports from the system.Some preliminary experimental results have shown theeffectiveness of the novel approach.
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