This article describes the development and implementation of an Internet-ba
sed educational system called Communicative Collection Assisting System (Co
CoA) designed to assist student-centered instructing and learning for forei
gn students in learning Japanese written composition. CoCoA realizes commun
icative correction by exchanging marked-up documents via Internet. We studi
ed exchange of corrected compositions, using Communicative Correction Mark-
up Language, a set of mark-up conventions used for encoding text. We propos
ed an effective method for finding out writing errors in the revised text,
With this method, when the teacher completed the correction of a student's
composition, CoCoA system call find and analyze the writing errors that exi
st the student's composition, and create an error profile for the compositi
on in certain types of Japanese morphological errors. The error profile can
be used to choose the materials with similar type of morphological errors
for the student's correcting exercise, and to help the teacher for understa
nding the student's weaknesses. On viewing the results of experimentation,
the CoCoA system can be used in the corrections of foreign students' compos
itions, and the instructions of foreign students' writing of Japanese compo
sitions. (C) 2000 Elsevier Science Ltd. All rights reserved.