TABLE 2.

Summary of the data collection procedure.

Two classes	1st English session	2nd English session	3rd English session	4th English session
Teacher feedback	Students completed the first writing task (pre-test of English writing proficiency).	Students completed the second writing task and submitted their essays to the English teacher.	Students revised their essays using the teacher feedback. The revision was scored by Pigaiwang.	Students completed the third writing task (post-test of English writing proficiency).
Automated feedback	Students completed the first writing task (pre-test of English writing proficiency).	Students completed the second writing task and submitted their essays in the Pigaiwang.	Students revised their essays using the feedback from Pigaiwang. The revision was scored by Pigaiwang.	Students completed the third writing task (post-test of English writing proficiency).