document: Alien Rescue : a problem-based hypermedia learning environment for middle school science The article describes an innovative hypermedia product for sixth graders in space science : Alien Rescue . Using a problem-based learning approach that is highly interactive , Alien Rescue engages students in scientific investigations aimed at finding solutions to complex and meaningful problems . Problem-based learning -LRB- PBL -RRB- is an instructional strategy proven to be effective in medical and business fields , and it is increasingly popular in education . However , using PBL in K-12 classrooms is challenging and requires access to rich knowledge bases and cognitive tools . Alien Rescue is designed to provide such cognitive support for successful use of PBL in sixth-grade classrooms . The design and development of Alien Rescue is guided by current educational research . Research is an integral part of this project . Results of formative evaluation and research studies are being integrated into the development and improvement of the program . Alien Rescue is designed in accordance with the National Science Standards and the Texas Essential Knowledge and Skills -LRB- TEKS -RRB- for science . So far Alien Rescue has been field-tested by approximately 1400 sixth graders . More use in middle schools is in progress and more research on its use is planned
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