The Journal tool in Moodle can be used it to keep notes of your progress during a course, i.e. you can return to this tool as many times as you like and add or change information. It works with the same editor as the forum and it is therefore easy to use. The teacher can read your messages and give comments or advice (which you are encouraged to read).
A new learning diary may look like this:
When you have started writing, your teacher can comment on and grade your work. Be aware that you can always return to your journal and update or correct your entries for as long as the journal is open (and of course the teacher too can change the feedback (and the grade, if any) according to how well you do). A journal page with feedback from the teacher looks something like this: