These online resources were selected as examples of sites that are available online for educators to use to find lesson ideas, online projects, movie clips, and/or interactive games/activities to use to help make the mathematical content real.

4Teachers.Org
Most of these resources are free. Since they are grant-driven, some are now subscription-based. But you can create rubrics, online quizzes, tracks (which are a list of websites that you can use in a lesson or for professional development), and online calendars.

California K-12 High Speed Network
This site is free to teachers who have an email address from a district. Places to share files and load podcasts.

Conceptua Math
Free, online tools for fractions instruction. These flexible fractions tools allow students to develop conceptual understanding, procedural strength and higher order thinking skills in this fundamental mathematics topic. Great for use on interactive whiteboards for whole-class instruction. Tools include fraction circles, horizontal and vertical bars, area model, dots (discrete), number line, benchmark fractions, unitizing with pattern blocks and more.

Dr. Math - the Math Forum
This is the site was created to help students (and teachers) find the answers to math problems.

Illustrative Mathematics
The Illustrative Mathematics Project will provide guidance to states, assessment consortia, testing companies, and curriculum developers by illustrating the range and types of mathematical work that students will experience in a faithful implementation of the Common Core State Standards, and by publishing other tools that support implementation of the standards.

Inside Mathematics
Welcome to Inside Mathematics, a professional resource for educators passionate about improving students' mathematics learning and performance. This site features classroom examples of innovative teaching methods and insights into student learning, tools for mathematics instruction that teachers can use immediately, and ;video tours ;of the ideas and materials on the site.

LBUSD-Curriculum: Mathematics: Teacher Resources
Long Beach Unified School District has a wonderful collection of PDFs that you can adapt for your own classroom. It is also good resource for math cognates to print out and has a pdf of math terms in other languages.

Math Assessment Project
The Mathematics Assessment Program (MAP) aims to bring to life the Common Core State Standards (CCSS) in a way that will help teachers and their students turn their aspirations for achieving them into classroom realities. Funded by the Bill and Melinda Gates Foundation, MAP is a project of the long-established Mathematics Assessment Resource Service (MARS) collaboration between the University of California, Berkeley, the Shell Center at the University of Nottingham, and the Silicon Valley Mathematics Initiative, working with school systems across the US and UK to develop improved assessment. The materials from this project will exemplify CCSS in explicit down-to-earth performance terms.

Math Circles
Mathematical Circles are a form of education enrichment and outreach that bring mathematicians and mathematical scientists into direct contact with pre-college students. These students, and sometimes their teachers, meet with mathematical professionals in an informal setting, after school or on weekends, to work on interesting problems or topics in mathematics. The goal is to get the students excited about the mathematics, giving them a setting that encourages them to become passionate about mathematics.

Mathematics in Movies 
This site from Harvard has video clips of movies that have a math connections. Some are actual video clips, others might be a screen shot of a person standing in front of a blackboard that has an equation on it.

mrcoley.com
Mr. Coley is a 5th grade classroom teacher who has created videos of math lessons and other resources.

NCTM Illuminations
Illuminations is designed to provide standards-based (online) resources that improve the teaching and learning of mathematics for all students. Provide materials that illuminate the vision for school mathematics set forth in Principles and Standards for School Mathematics.

National Library of Virtual Manipulatives
This site has an easy matrix to help you narrow your search for the virtual manipulatives or activities you might be able to use in your lesson.

NRICH Home Page
This is the portal for this wonderful site from Cambridge University with interactive sites in many math topics. This project has problems, articles and games for teachers and students.

Oswego City School District - Regent Exam Prep Center
This site is a resource teachers for assessment ideas and is a place to refer middle school and high school students to for additional help.

PUMAS

PUMAS is a collection of brief examples showing how math and science topics taught in K-12 classes can be used in interesting settings, including every day life.

The examples are written primarily by scientists, engineers, and other content experts having practical experience with the material. They are aimed mainly at classroom teachers, and are available to all interested parties via the PUMAS web site.

Our goal is to capture, for the benefit of pre-college education, the flavor of the vast experience that working scientists have with interesting and practical uses of math and science.

Project Lead the Way
Project Lead The Way (PLTW) prepares students to be the most innovative and productive leaders in Science, Technology, Engineering, and Mathematics (STEM) and to make meaningful, pioneering contributions to our world. PLTW partners with middle schools and high schools to provide a rigorous, relevant STEM education. Through an engaging, hands-on curriculum, PLTW encourages the development of problem-solving skills, critical thinking, creative and innovative reasoning, and a love of learning. The PLTW middle and high school STEM education programs give students a brighter future by providing them with a foundation and proven path to college and career success in STEM-related fields. STEM education is at the heart of today’s high-tech, high-skill global economy. For America to remain economically competitive, our next generation of leaders must develop the critical-reasoning and problem-solving skills that will help make them the most productive in the world. PLTW sparks the ingenuity, creativity, and innovation within all of our students.

Smart Skies

Free, hands-on Distance-Rate-Time investigations in air traffic control. An effective and fun way to educate using multiple math methods, reality-based experiments, movies, and a web-based simulator.

SMILE ( Science and Math Informal Learning Educators)

Are you looking for new ways to teach kids about math and science? Do you want activities that meet you where you live, whether your “classroom” is an active volcano, the shark tank at the local aquarium, or your own kitchen table?

You’ve come to the right place. SMILE is collecting the best educational materials on the web and creating learning activities, tools, and services – all designed especially for those who teach school-aged kids in non-classroom settings.

Come to SMILE for science and math activities that you and the kids in your life will love. But come, too, for the community. We are encouraging educators to both use and contribute to the growing SMILE collection. People like you will make SMILE a meeting place for educators excited about what they do and ready to talk about how they do it.

SMILE is the Science and Math Informal Learning Educators pathway of the National Science Digital Library (NSDL).

STEM Inventory
Welcome to the STEM education community! Look no further. The Science, Technology, Engineering, and Math (STEM) Inventory is "the place" to go to research and find existing STEM education programs available that serve audiences throughout the entire STEM workforce pipeline, including Career Technical Education. The inventory is a great way for STEM education stakeholders to locate a STEM education and/or training program in their vicinity. It hosts programs for students, teachers, parents, and those looking to get involved with a STEM education program. For your convenience, search by keywords based on topic, region, grade level and more. . If you would like to add a program to the STEM Inventory website, please register to be a user. The inventory offers users free advertising of their upcoming events and news. Help us create a virtual community for ALL of the STEM education and CTE stakeholders Spread the word today!

Teachers' Domain
Teachers' Domain is an extensive library of free digital resources from public television and other leading media producers, designed for classroom use and professional development.

TeacherTube
This is a site that hosts online videos for teachers (by teachers). There are ads on the pages, but some of the moves are quite interesting and engaging. Search through the video clips to help math more entertaining or to get ideas from other teachers on how to teach a lesson.

National Library of Virtual Manipulatives
This site has an easy matrix to help you narrow your search for the virtual manipulatives or activities you might be able to use in your lesson.