The sites listed below are ever-changing and contain content of varying degrees of cognitive demand.

Most of these websites provide resources that are completely free.

http://illuminations.nctm.org/ - This website contains a collection of 580 lessons for PreK - 12 math educators which are searchable by grade band, standard, or specific topic.

http://www.learner.org/resources/lessonplanbrowse.html?d[]=MATH Annenberg Learner's mission is to "Advance Excellent Teaching in American Schools." by funding and distributing multimedia resources for teachers (K-12 and college levels) to teach their subjects and to stay up-to-date in their fields.

http://map.mathshell.org/materials/stds.php - Mathematics Assessment Project has complete middle- and high-school lessons aligned to the Standards for Mathematical Practice and more.

http://www.intel.com/content/www/us/en/education/k12/stem.html -To help educators foster the next generation of innovators, Intel provides STEM curriculum, competitions, and online resources to encourage students' interest and participation. Includes project-base Math units.

Assessment support

http://www.utdanacenter.org/k12mathbenchmarks/tasks/tasks.php These secondary level-written tasks, are a rich set of sample instructional tasks that exemplify expectations leading to Achieve's college- and career-ready standards. These tasks cover a range of student expectations and include a variety of solution strategies.

http://nces.ed.gov/TIMSS/Educators.asp - This website contains previously released TIMSS items at the 4th and 8th grade levels. The items are organized by standard and include multiple choice, short constructed response, and extended constructed response.

http://www.apecknowledgebank.org/mathassessment/Search_Assessment.aspx - The Asia Pacific Economic Cooperation mathematics assessment database provides sample assessment items from grades 3 through 11. This database is part of a newly started United States project to collect sample items from summative assessments of APEC member economies.

Other resources

http://www.figurethis.org/challenges/math_index.htm - Figure This! is a Public Outreach campaign designed to engage families of middle school students in working on mathematics together. The campaign consists of 80 math challenges organized by standard . They are designed for middle school students and their families to work on at home but could also be used in the classroom.

http://www.timiddlegrades.com/ - This website includes math and science activities which incorporate Texas Instruments technology at the middle school level.

www.timath.com - This website contains archived high school math activities which incorporate Texas Instruments technology. These activities are searchable by standard and type of technology.

www.geogebra.org - GeoGebra is free mathematics software for teaching and learning which incorporates interactive graphics, algebra, and spreadsheets appropriate for elementary through high school students. The site also contains a GeoGebraWiki which is a free pool of teaching materials for the dynamic mathematics software GeoGebra. Everyone can contribute and upload materials! All contents may be used free of charge.

https://www.sensepublishers.com/media/639-mathematical-tasks-in-classrooms-around-the-world.pdfMathematical Tasks in Classrooms Around the World## The sites listed below are ever-changing and contain content of varying degrees of cognitive demand.

## Most of these websites provide resources that are completely free.

http://illuminations.nctm.org/ -This website contains a collection of 580 lessons for PreK - 12 math educators which are searchable by grade band, standard, or specific topic.http://m3challenge.siam.org/problem/sampleProblems.php- Sample in-depth problems from Moody's Mega Math Challenge. They are open-ended, applied math modeling problems focused on a real-world issue.Assessment support## http://www.utdanacenter.org/k12mathbenchmarks/tasks/tasks.php These secondary level-written tasks, are a rich set of sample instructional tasks that exemplify expectations leading to Achieve's college- and career-ready standards. These tasks cover a range of student expectations and include a variety of solution strategies.

## http://balancedassessment.concord.org/ - From 1993 to 2003, the Balanced Assessment in Mathematics Program existed at the Harvard Graduate School of Education. The project group developed a large collection of innovative mathematics assessment tasks for grades K to 12. The library of over 300 mathematics assessment tasks developed during the project remains freely available through this web site.

## http://nces.ed.gov/TIMSS/Educators.asp - This website contains previously released TIMSS items at the 4th and 8th grade levels. The items are organized by standard and include multiple choice, short constructed response, and extended constructed response.

## http://nces.ed.gov/nationsreportcard/itmrlsx/search.aspx?subject=mathematics - This website contains previously released NAEP items at the 4th, 8th, and 12th grade levels. The items are searchable by standard, grade level, type of question, and level of cognitive demand.

## http://www.apecknowledgebank.org/mathassessment/Search_Assessment.aspx - The Asia Pacific Economic Cooperation mathematics assessment database provides sample assessment items from grades 3 through 11. This database is part of a newly started United States project to collect sample items from summative assessments of APEC member economies.

Other resources## http://www.figurethis.org/challenges/math_index.htm - Figure This! is a Public Outreach campaign designed to engage families of middle school students in working on mathematics together. The campaign consists of 80 math challenges organized by standard . They are designed for middle school students and their families to work on at home but could also be used in the classroom.

## http://www.timiddlegrades.com/ - This website includes math and science activities which incorporate Texas Instruments technology at the middle school level.

## www.timath.com - This website contains archived high school math activities which incorporate Texas Instruments technology. These activities are searchable by standard and type of technology.

## http://www.gelessons.com/lessons/ - This website contains math and science lessons which make use of Google Earth.

## www.geogebra.org - GeoGebra is free mathematics software for teaching and learning which incorporates interactive graphics, algebra, and spreadsheets appropriate for elementary through high school students. The site also contains a GeoGebraWiki which is a free pool of teaching materials for the dynamic mathematics software GeoGebra. Everyone can contribute and upload materials! All contents may be used free of charge.

## http://blog.mrmeyer.com/ Dan Meyer's blog and catalog of problem ideas.