Association of Teachers of Mathematics  
   aims to support the teaching and learning of mathematics by encouraging increased understanding and enjoyment of mathematics.
   http://www.atm.org.uk/

ERME  
   European Society for Research in Mathematics Education
   http://math.unice.fr/%7Eiremnice/erme/index.html

T3 Worldwide  
   Teachers Teaching with Technology in Mathematics and Science
   http://www.t3ww.org/

Mathematical Association of America  
   (MAA) invites members and non-members alike interested in collegiate mathematics to peruse its site.
   http://www.maa.org/

Computer Algebra in Mathematics Education  
   An open international organisation for those interested in the use of computer algebra software in mathematics education.
   http://ltsn.mathstore.ac.uk/came/

AMET  
   Association of Mathematics Education Teachers (UK).
   http://www.edweb.co.uk/amet/amet.htm

Teaching and Learning Undergraduate Mathematics  
   A working group of the Mathematical Association, which produces the TaLUM newsletter.
   http://www.bham.ac.uk/ctimath/talum/

Australian Association of Mathematics Teachers (AAMT)  
   Group activities, membership details, announcements, events, and special materials for teachers.
   http://www.aamt.edu.au/

SMDF - Swedish Society for Research in Mathematical Education  
   (Svensk Förening För Matematikdidaktisk Forskning).
   http://www.mai.liu.se/~chber/SMDF/english.htm

Hawaii Council of Teachers of Mathematics  
   Contact information, newsletters, meetings.
   http://www.math.hawaii.edu/%7etom/hctm.html

The International Commission on Mathematical Instruction (ICMI)  
   A commission of the International Mathematical Union (IMU), charged with the conduct of the activities of IMU bearing on mathematical or scientific education. ICMI takes the initiative in inaugurating appropriate programmes designed to further the sound
   http://elib.zib.de/IMU/ICMI/

Scottish Mathematical Council (SMC)  
   The main objectives of the Council are to foster and improve mathematical education at all levels, and to encourage the advancement and application of mathematics throughout Scotland. Among other activities, the SMC publishes an annual Journal and organ
   http://www-maths.mcs.st-and.ac.uk/~smc/

The Open Learning Foundation Mathematics Working Group  
   to encourage and help member institutions to develop a more flexible approach to their teaching and learning strategies, in particular with respect to open learning.
   http://pass.maths.org.uk/issue2/staffroom/olf.html

Irish Mathematics Teachers' Association (IMTA)  
   Aims to further the study and teaching of Mathematics and to foster co-operation between teachers of Mathematics at all levels.
   http://www.acts.tinet.ie/irishmathematicsteache_645.html

AIMS Education Foundation  
   Explores the effectiveness of integrating mathematics and science in grades 5-8.
   http://www.aimsedu.org/txtAIMS.html

AMUCME  
   African Mathematical Union Commission on Mathematics Education in Africa.
   http://www.math.buffalo.edu/mad/AMU/amucme.html

Adelaide Consortium for Mathematics Education (ACME)  
   Aims to further the teaching of mathematics and the study and teaching of mathematics education in South Australia. Details about the group's members and activities.
   http://www.maths.adelaide.edu.au/ACME/start.html

South African Mathematics Education Reform Network (SAMERN)  
   A network of teachers and researchers interested in Mathematics Education at post-secondary level.
   http://science.up.ac.za/samern/

National Council of Teachers of Mathematics  
   Dedicated to improving the teaching and learning of mathematics.
   http://www.nctm.org/

Oregon Council of Teachers of Mathematics  
   The website for the professional organization of math teachers in the state of Oregon.
   http://www.octm.org/

Queensland Association of Mathematics Teachers (QAMT)  
   Professional development activities, professional and student journals, and competitions for students.
   http://qamt.org/

International Group for the Psychology of Mathematics Education  
   Promotes international contacts and the exchange of scientific information in the psychology of mathematics education. Organization details, guidelines and latest news.
   http://members.tripod.com/~IGPME/

Consortium for Mathematics and its Applications (COMAP)  
   A non-profit organization, whose mission is to improve mathematics education for students of all ages.
   http://www.comap.com/

Maine Mathematics and Science Alliance(MMSA)  
   A non-profit partnership of educational, business, research, and community leaders
   http://www.mmsa.org/

Association for Mathematics Education of South Africa (AMESA)  
   Homepage of the Association for Mathematics Education of South Africa (AMESA), representing the interests of its members and of the discipline.
   http://www.sun.ac.za/mathed/AMESA/

Minnesota Council of Teachers of Mathematics  
   Resources for information and communication concerning: - Upcoming Conferences and Events - MCTM Organizational Information - Internet Resources for Mathematics
   http://www.mctm.org/

Pennsylvania Council of Teachers of Mathematics  
   Dedicated to providing the best mathematics education possible at all levels in the Keystone State.
   http://www.PCTM.org/

American Mathematical Association of Two-Year Colleges  
   Exclusively devoted to providing a national forum for the improvement of the instruction of the mathematics in the first two years of college.
   http://www.amatyc.org/

New York State Mathematics Association of Two-Year Colleges (NYSMATYC)  
   A membership of over 350 representing more than 50 of the two-year colleges in New York State.
   http://www.nysmatyc.org/

Ontario Colleges Mathematics Association  
   The mission of the Ontario Colleges Mathematics Association is to promote and facilitate communication among individuals with an interest in mathematics education in the Colleges of Applied Arts and Technology of the Province of Ontario.
   http://www.mohawkc.on.ca/dept/math/OCMA/ocma.html

New Mexico Mathematical Association of Two-Year Colleges (NMMATYC)  
   Affiliated to AMATYC.
   http://www.unm.edu/~nmmatyc/

Women And Mathematics Network  
   A consortium of Program Directors of outreach programs in mathematics for women and girls. Meetings and resources.
   http://www.mystery.com/WAM/

The Tennessee Mathematical Association of Two-Year Colleges  
   The official Tennessee affiliate of the American Mathematical Association of Two-Year Colleges.
   http://FIRE1B.MATH.UTK.EDU/TMATYC/

National Association of Maths Advisers  
   Aims to ensure that inspection, advice and support, individually and collectively, make an effective contribution to mathematics education in the UK.
   http://www.nama.org.uk/

Association of Mathematics Teacher Educators  
   A non-profit organization created to promote the improvement of mathematics teacher education in all its aspects. Based at the Center for Research in Mathematics and Science Education, San Diego State University.
   http://www.amte.net/

Teaching and Learning Undergraduate Mathematics (TaLUM)  
   A working group of the UK Mathematical Association, which produces the TaLUM newsletter.
   http://www.birmingham.ac.uk/ctimath/talum/

School Mathematics Project  
   An educational charity in the UK which develops textbooks and other teaching materials for the secondary age range and runs in-service courses for teachers.
   http://www.smpmaths.org.uk/

New Zealand Association of Mathematics Teachers (NZAMT)  
   Brings together educationalists from all levels of the education sector in New Zealand, from preschool to tertiary, to promote better teaching and learning of mathematics.
   http://www.nzamt.org.nz/

Clay Mathematics Institute  
   Sponsors events for talented high school students, professional symposia, and diseminating new research news in the field. Includes goals and details of ongoing projects. Located in Cambridge, MA.
   http://www.ClayMath.org/

NANAMIC - National Association for Numeracy and Mathematics in Colleges  
   An association of further education, tertiary and sixth form colleges in the UK, formed with the aim of assisting colleges nationally in developing quality in all aspects of their work in mathematics and numeracy.
   http://nanamic.sermisy.com/

The Liverpool Mathematical Society  
   A group of teachers, tutors and students with an interest in supporting and furthering mathematics education at all levels in the local area.
   http://www.maths.liv.ac.uk/lms.html

ACME  
   The Royal Society of London Advisory Committee on Mathematics Education. Activities and reports.
   http://www.acme-uk.org/

Every Child Mathematically Proficient  
   An Action Plan of the Learning First Alliance, an organization of 12 leading national education associations, to bring American students to world-class levels in mathematics.
   http://www.learningfirst.org/issues/math/

Center for Mathematics, Science, and Technology  
   Purpose of group is to help in the advance of learning and teaching of mathematics, science, and technology so that students of all ages can thrive in a technological world. Services includes educational modules and school scholarships. Located at Illin
   http://www.ilstu.edu/depts/cemast

British Society for Research into Learning Mathematics  
   For researchers into better teaching methods in the field. Includes publications, meetings, resources.
   http://www.bsrlm.org.uk/

Advisory Committee on Mathematics Education  
   An independent committee which acts as a single voice for the UK mathematical community, seeking to improve the quality of education in schools and colleges.
   http://www.royalsoc.ac.uk/acme/

Math for America  
   Working with teachers, school administrators and other stakeholders to improve the quality of mathematics education in US public schools. Details of Newton Fellowship program.
   http://www.mathforamerica.org/

Missouri Mathematical Association of Two-Year Colleges (MOMATYC)  
   Assists instructors with finding solutions to teaching challenges and to work with other related professional organizations to improve the quality of curriculum within the state. Includes officers, annual conferences, and newsletter (in pdf format).
   http://momatyc.kcmetro.cc.mo.us/

Oregon Mathematical Association of Two Year Colleges (ORMATYC)  
   Created to encourage quality mathematics educational programs, support professional development and a forum to discuss issues that are impacting on a statewide level. Page includes list of officers and contact information.
   http://new.chemeketa.edu/ormatyc/