Photos and Copyright Friendly Clip Art
Creative Commons - Not automatically copyright "free". Look for the CC-license. Often pieces require attribution. The most common restrictions are: Attribution must say to whom the original belongs, NoDerivs (you can't change the image), NonCommercial (can't use it if you get money), ShareAlike (If allowed to change and you do it, you have to allow others the same right to use and change your work.)
Wikimedia - a database of multimedia files to which anyone can contribute. Check individual work for CC-License or Public Domain statis.
FlickerCC - photos on Flicker grouped by their CC license.
Free Foto - "FreeFoto.com is the largest collection of free photographs on the Internet (link back and attribution required)."
Pics4learning - "Pics4Learning is a copyright-friendly image library for teachers and students."
Student - Eye Views - photos taken by PJMS students. Bibliographical information included for citation.

Research
Plagiarism Guide for Students - Very easy to understand guide by Sue Thompson & Toni Olivas, Cal State San Marcos Library.
Easy Bib - for help in creating bibliographies. The new auto cite feature works well for most web sites.
D97's Writing & Research Basics - Guide for grades 5-8 when writing research papers.
Research Basics Jr. - guide for beginning the research process in grades 2-4.
RBasics Jr. Teacher's Guide - help for teachers introducing research to young students.

Global Collaboration
Global SchoolNet -" engage teachers and K-12 students in meaningful project learning exchanges worldwide to develop science, math, literacy and communication skills, foster teamwork, civic responsibility and collaboration, encourage workforce preparedness and create multi-cultural understanding."
Global Virtual Classroom - "The Global Virtual Classroom (GVC) is a collection of free, online educational activities and resources. It aims to complement the efforts of governments and educators around the world to integrate technology into their classrooms and curricula and to link their schools to the Internet in educationally productive ways."
Global Dreamers - prompts students at Ein Ganim and from around the world to join in a multicultural project that captures students' thinking in a visual way. "GlobalDreamers" inspires children to take a deeper look at the world by exploring, exchanging ideas, and using research tools.