BrainPOP is one of my favorite website for engaging students and supporting educators. The authors have created animated, curriculum-based content Flash-based movies, quizzes, experiments, timelines, activity pages, and much more covering hundreds of topics within Math, Science, Social Studies, English, Technology, Arts & Music, and Health. All of the content is aligned with state standards.
BrainPOP is accessible entirely online; there's no software to install or download. You can use BrainPOP's resources with PCs, Macs, projectors, or interactive whiteboards.
Check out the BrainPOP for educators' site full of useful teachers' resources: Lesson plans, academic standards, curriculum calendar, blogging and so much more! FYI, there's also a free BrainPOP app for your iTouch or iPhone.
The goal of this math website is to help elementary school (Grade 1st through 6th) children boost their math problem solving and critical-thinking skills. MathStories.com has over 15,000 online and printable NCTM compliant math word problems for children to enjoy! Word problems are available in both English and Spanish. MathStories.com is the website for busy teachers, eager students, and involved parents. MathStories.com is comprehensive and easy to navigate.