Aims
A critical topic in mathematics education is the design and analysis of open-ended, realistic, and exemplary tasks. Task design and analysis is a relatively new field, appearing for the first time as a topic of study (TSG 34) at ICME-11 in Monterrey, Mexico. It is developing quickly and dynamically as an area of international attention and active research.
Topic Study Group 31 will bring together researchers, developers and teachers who systematically investigate and develop theoretical and practical accounts of task design and analysis. We welcome proposals from both researchers and practitioners and encourage contributions from all countries. Presentations and discussions will target new trends, new understanding, and new developments in research and practice.
We have a particular interest in empirically grounded contributions that underline design principles and theoretical approaches, and give examples of tasks designed for promoting mathematical development. We plan to discuss (but are not limited to) the following themes:
1. Theoretical and practical development that guides task design and analysis
2. Diverse theoretical approaches or principles that guide task design and analysis
3. Diverse practical traditions/approaches that guide task design/analysis and their theoretical accounts
4. Examples of task analysis for studying the relations between tasks, psychological development, and mathematical development.
5. Critical literature studies or meta-analysis of task design and analysis
The group will welcome contributions that focus on primary or secondary education.
Research and development in task design and analysis presented at ICME-11 is retrievable at (http://tsg.icme11.org/tsg/show/35).

Organization
1. On the website of ICME-12 it is possible to follow the planning process and eventually access all relevant documents including the timetable for TSG sessions. Each TSG will have four 90 minute timeslots (on Tuesday, Wednesday, Friday and Saturday mornings) at their disposal. This makes TSGs the prime forum for participation.
2. We expect that participants will engage in the review process prior to the conference, and we will nominate respondents to all presentations in order to enable deeper levels of critical discussion during the conference.
3. The presenters will work in pairs and make short comments or elaborate on each other's work after every presentation. In this way, we hope to make TSG 31 into an active study group.

Guidelines for submission
The organizing team welcomes significant contributions related to the theme.
Interested participants are encouraged to email the co-chairs of TSG 31 and access the TSG 31 webpage when we begin to add contributions. Participants are requested to submit a proposal no later than November 30, 2011 both via e-mail to the two team chairs and through the on-line submission system at the Congress website.

• The length of the proposal should be between 1500 and 2000 words.
  
• Indicate the name(s) of the author(s), their location (town, country, school or establishment) and contact details. Proposals for contributions should be put forward no later than November 30, 2011.
  
• If the proposal is accepted, the final draft should be submitted on-line no later than April 10, 2102.

On-line submission
Go to<My Page> at the first page of the Congress Homepage http://icme12.org or press <Submit your proposal> button on TSG 31 website in the Congress Homepage.

Deadlines
November 30, 2011 Proposal submission
January 15, 2012 Notification of acceptance
April 10, 2012 Submission of final draft

Organizers
Co-chairs : Xuhua Sun(China) xhsun@umac.mo
                 LalinaCoulange(France) lalina.coulange@free.fr, lalina.coulange@gmail.com
Team Members : Eddie Chi-keung Leung(Hong Kong)ckleung@ied.edu.hk
                          Nguyen Chi Tanh(Vietnam) thanhnc70@yahoo.com
                          Hea-Jin Lee(Korea) hlee@lima.ohio-state.edu
Liaison IPC Member : Masataka Koyama mkoyama@hiroshima-u.ac.