Link to Internet sites that are carefully chosen to support, extend, and enhance your students' understanding of Houghton Mifflin Science DiscoveryWorks. Each trip includes a printable Trip Log, which your students can use to record their Internet site visit.		Link to Internet sites that will support and extend the hands-on Unit Projects in Houghton Mifflin Science DiscoveryWorks. Ask questions of online experts. Find people and places that will help your students successfully complete their projects.