I am interested if there is a dictionary of the terms that are used for mathematics education, mathematics learning and/or mathematics teaching in academic level.
See if this helps--but if I could merely suggest that you consult with your textbook publishing companies that offer course textbooks in the field of Mathematics--the representative might be able to help you.
Thanks Lluis, that is a useful answer, Encyclopedia of Mathematics Education may be a good source (http://www.springer.com/us/book/9789400749771#aboutBook)
Do you maybe know how to reach this source online?
Here is another: " The Language of Mathematics Education: An Expanded Glossary of Key Terms and Concepts in Mathematics Teaching and Learning " by Shannon W. Dingman, Laura B. Kent, Kim K. McComas and Cynthia C. Orona.