Prologue

Dear Colleagues, Old and New Friends,

It is a great pleasure to present the Proceedings of TIME 2012 (Technology and its Integration in Mathematics Education 2012) held from July 10th to 14th in Tartu, Estonia.
 
The reference to Proceedings is:
 
        Proceedings of TIME 2012. July 2012. Tartu (Estonia). ISBN: 978-9985-4-0737-0.
 
The conference has changed its name several times from Spring School Krems 1992 to International DERIVE & TI-92 Conference, from ACDCA Summer Academy and VISIT-ME 2002 to TIME since Montréal 2004. We were proud to celebrate the 20th year of this conference series in Tartu. The conference TIME 2012 combined 2 conferences:
 
No matter where it has been held, the conference has preserved a special spirit and atmosphere. One of the most important guardians of the conference series is Josef Böhm. He is also the editor of the 1st and many other proceedings. 72 participants from 18 countries joined the conference in Tartu. In addition, 17 accompanying persons have participated in the program for them.
 
53 proposals were accepted after being peer-reviewed by program committee members. These proposals can be classified into 5 Keynote Lectures, 3 Discussion Panels, 5 Workshops and 40 Lectures.
 
Selected papers from the conference will be published in the special issues of the following journals:
The special issues of the journals will appear during the year 2013 after an additional review process. The guest editors are José Luis Galán García, Pedro Rodríguez Cielos and Gabriel Aguilera Venegas.
 
Each contribution in the Proceedings can be found by its title (Index – Title) or by its authors (Index – Authors) and contains the abstract in pdf format, the presentation (or the full paper if the authors sent it for the Proceedings) in pdf or ppt/pptx format (in the same format as the authors sent it) and extra files (if any) usually in a zip file.
 
There are many people who have helped to organize this conference: chairs and members of the program committees, keynote speakers, presenters of lectures and workshops, members of the local organizing committee, etc. Many thanks to all of them!
 
We are also very grateful to our sponsors: Estonian Ministry of Education and Research, Texas Instruments, Tiger Leap Foundation and Faculty of Mathematics and Computer Science.
 
Have a good and interesting use of TIME 2012 Proceedings!
 
Marina Lepp
Eno Tõnisson
Editors of TIME 2012 Proceedings