Writing is an activity that takes time, and for that reason it is often neglected in the content areas. The benefits of writing greatly outweigh the limits. Just as doing mathematics requires gathering, clarifying and organizing thoughts, finding out what is known and not known, and planning to solve a problem, so does writing. Writing in mathematics can help students make sense of the processes and help teachers understand what students are learning.
Websites on Writing in Mathematics:
Mathpower.com  Student Tutorials for Algebra
http://www.mathpower.com/tutorial.htm
Mathpower.com  Student Tutorials for Mathematics Fundamentals
http://www.mathpower.com/tutorialfund.htm
Math Songs and Poems
http://www.mscc.cc.tn.us/webs/vyoung/songs/main_pages/tables.htm
In Class Writing Assignments in the Content Areas
http://www.mathnstuff.com/papers/inclass.htm
Using Writing in Mathematics
http://www2.ups.edu/community/tofu/lev2/journaling/writemath.htm
Math Journals for All Ages
http://math.about.com/library/weekly/aa123001a.htm
Writing in Mathematics
http://www.geocities.com/kaferico/writemat.htm#A
Options for Writing in Math PDF
http://www.springfield.k12.il.us/resources/math/Assessment/optionsforwritinginmath.pdf
A Guide to Writing in Mathematics by Dr. Kevin P. Lee  PDF
http://www.stat.ualberta.ca/~wiens/purdue1_write.pdf
Mathematical Writing to Inform Rubric  PDF
http://cte.jhu.edu/techacademy/web/2000/heal/pdf%20files/inform.pdf
Math Out Loud! Talking and Writing about Math
http://content.scholastic.com/browse/article.jsp?id=3585
