Wishes on a wall

The useful features of the wall wishers are:
1) Allows us to share ideas
2) Is a good way to communicate with classmates and teachers after school hours
3) Is a good platform for project discussions
The limitations of the wall wisher are the limited amount of characters allowed in a post and the limited size  of the post.
The wall wisher can be used as a platform for communication and projects even after school hours between  the teachers and pupils.