Mathematics education resources for teachers
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http://101qs.comAn opportunity for mathematics teachers to share videos and images with the goal of creating a collection of mathematically perplexing objects. Each of the images or videos shared embodies a mathematical concept or idea, and should beg students to ask mathematical questions.@davidweesAll
3 website has many rich mathematics tasks. While these tasks do not have the Common Core standards stamped on them, they definitely are mathematical tasks that will require student to think and explain their reasoning. @davidweesAll
Over 5,000 complete Common Core-aligned lessons from our 130 Master Teachers.
This is an online community of math educators that regularly host webinars on topics in mathematics education, drawing from a wide variety of speakers. Past webinars are recorded, so you can explore topics from previous sessions. You can also use the discussion forums to discuss ideas with other mathematics educators.@davidweesMiddle school and secondary
6 their website: "Collaborative Mathematics and the Video Challenge Project aim to use video as a means of connecting a worldwide community of mathematical problem solvers."@davidweesAll
7 free, online graphing calculator. It has a number of functions not built into a regular graphing calculator, and has the advantage of being sharable and accessible from anywhere.@davidweesMiddle school and secondary
8 collection of daily estimation tasks. The idea of this collection is to help build student’s estimation skills by having them try it out daily. One big advantage of this site is the estimation examples used reduce the chance students will try and calculate the answer before estimating.@davidweesAll
9 is a set of eight exercises, hosted on a Wordpress blog, with the aim of introducing mathematics educators to the online world of math blogs, and other online resources available.@davidweesAll
http://geogebra.orgFree software for interactive algebra and geometry. You can create your own models for students to explore, or just use the software to create diagrams for use on your math tasks. With some recent changes, this software will run on pretty much any computer or device.

For examples of what other teachers have done with Geogebra, check out
http://graphingstories.comHas a small but very useful collection of videos that can be represented as graphs. The site includes instructions on how you can use it in your classes. It could be very useful for students learning how to understand graphs and functions.@davidweesHigh School
12 problem-based lessons@misterpattersonMainly middle/high some elementary
13 their website: "Illuminations works to serve you by increasing access to quality standards-based resources for teaching and learning mathematics, including interactive tools for students and instructional support for teachers."@davidweesAll
http://illustrativemathematics.orgThis is a set of tasks aligned to the Common Core standards that can act as examples of what the different standards look like in practice.@davidweesAll
15 of different instructional activities mathematics teachers can use in their classroom. Some of these activities are probably things many of you have done, and many of them are not.@davidweesAll
16 focused on UbD framework; scroll down for link to document listing math resources, both sample plans and related performance tasks@rcwestjrAll
17 for many different polyhedra, including some really interesting shapes. These would be excellent for a geometry unit where one is looking at properties of geometric shapes, as well as for building students’ understand of the relationship between 2d and 3d shapes.@davidweesAll
18 formative assessment lessons and professional development resources, as well as useful rich math tasks for students organized by content area.@davidweesAll
19 minute videos from different mathematics teachers around the world describing a lesson. If you are looking for inspiration on ways you can change your pedagogy, check out this curated collection.@davidweesAll
http://mathalicious.orgAn excellent source of real-life math problems. From their website: “Mathalicious lessons teach standards-based math through real-world topics that students care about.” This resource has some free lessons included, but it costs $185 per year, but the lesson plans they provide come with everything you need to do the lesson with your students.@davidweesMiddle school and secondary
http://mathblogging.orgThey have organized as many blogs as they can find on mathematics and mathematics education. If you are looking for resources or perspectives on either mathematics or mathematics education, this could be a very useful site.@davidweesAll
22 of conversations with mathematics education researchers.@davidweesAll
23 their website: "Our mission is to provide resources, materials, activities, person-to-person interactions, and educational products and services that enrich and support teaching and learning in an increasingly technological world."@davidweesAll
http://mathmistakes.orgA terrific resource for teacher professional development. On this site are many examples of student work (with errors included) shared and discussed by mathematics teachers who attempt to diagnose the issue the student may be having, and then offer some suggestions as to how to help the student.@davidweesAll
http://mathmunch.orgEach week the authors of this blog post three great finds from around the mathematical internet. Poke around, find something you like, and dig in. Bon appetit!@davidweesAll
26 advice and information on how to become a connected mathematics educator. Instead of only sharing your practice with the people in your building or at the occasional conference, this site will help you learn how to share your practice with hundreds of other passionate and excellent mathematics educators.@davidweesAll
27 Noodles is a community of mathematics educators, homeschoolers, parents, and leaders of math circles. Their objective is to uncover and share playful mathematics. They are part community, part resource, and part platform for crowdfunding. They also have an amazing book that shows parents how they can play mathematics with their kids.@davidweesElementary school
28 their website: "NRICH is a team of qualified teachers who are also practitioners in RICH mathematical thinking. This unique blend means that NRICH is ideally placed to offer advice and support to both learners and teachers of mathematics."@davidweesAll
29 their website: "A number string is a set of related math problems, crafted to support students to construct big ideas about mathematics and build their own strategies...Strings are not a rigid recipe but a flexible classroom routine — used by teachers daily or weekly with both small groups and entire classes."@davidweesAll
30 simple construction tool that includes the ability to draw circles and lines. What makes it it addictive is the series of challenges they offer. So far every math teacher I have shared this with has enjoyed it. It might be an interesting alternative to a unit on proofs and/or geometric constructions, or just as something to give students to try out.@davidweesMiddle school and secondary
31 website has a selection of algebra-reasoning balanced puzzles that students can use to develop their pre-requisite numeracy understandings either in support of or before learning how to solve equations.@davidweesMiddle school and high school
32 the website: "This website is dedicated to helping parents support their children’s mathematical development. We know we need to read with our children every day, but what should we do for math? Answer: Talk about math with them as we and they encounter numbers and shapes in our everyday lives."@davidweesElementary and middle school (but could be extended to secondary school)
http://threeacts.mrmeyer.comA list of Three Act math tasks, curated by Dan Meyer. These are rich mathematics tasks that start with a picture or video that lends itself well to students asking their own mathematical questions.@davidweesMiddle school and secondary
http://visualpatterns.orgA growing collection of patterns represented in a visual way. They would be useful as short problem solving prompts for students. The site also includes a number of student-created prompts, so this could also be an excellent way to share student ideas.@davidweesMiddle school and secondary
35 EQuIP website (Educators Evaluating the Quality of Instructional Products) from Achieve aims to identify high-quality materials aligned to the Common Core State Standards. Educators in Massachusetts, New York, and Rhode Island developed rubrics and a peer-review process to evaluate the quality and alignment of lessons and units. The website also includes e-learning modules, videos, and a student-work protocol. @rcwestjrAll
http://www.chiprime.comLook at the resources section. Interesting startup on math education.
Good products too. Vision and mission statement video here:
Products: [1] Free app for Grade School Math (Xth Grade or GRE/GMAT level):
[2] High School Math app for Android (12th grade level)
[3] Free resources for download (quizzes with solutions too) - useful for SAT, GRE, GMAT:
There are free quizzes with solutions there too. Just look under "additional resources".
@gnokemGrade School (9-10 grade),
High School (12th grade)
GRE/GMAT preparation
http://www.edreports.organ independent, nonprofit service that will provide free online reviews of major textbooks and curriculum materials that purport to be aligned to the Common Core.@rcwestjrAll
38 to the Algebra Project started by Bob Moses. Math Literacy and Social Justice@TheLouReview
39 site for helping students learn how to use mathematics to justify their reasoning. It is a collection of different options students can choose, and their basis for choosing should be the mathematics they do to decide which option is best. This could be a good way to introduce mathematical discussions with your students as they debate which option they would prefer.@davidweesMiddle school and secondary
http://youcubed.orgYouCubed is a nonprofit providing free and affordable K-12 mathematics resources and professional development for educators and parents. @davidweesAll
41 are James Tanton's free online courses for students, parents, or teachers.@davidweesAll
http://tedd.orgThis website contains detailed descriptions of instructional activities along with planning templates, videos of these instructional activities in action. This is an excellent website for teachers or math coaches looking to think about their teaching. @davidweesAll
43 website creates prompts that a teacher can potentially use to engage students in conversations about which of the objects given doesn't belong. All four of the objects given have reasons why they don't belong so that this site become less about the answer and more about thinking about justification.