Click the Administer | User management | Roles link, or navigate to admin/user/roles. Click the edit permissions link for the student role. Scroll down to the rights for the node module; assign students the right to create bookmark content, delete own bookmark content, and edit own bookmark content.

Click the Save permissions button to save the updated permissions for the student role.

Now, both students and teachers have the rights to create bookmarks, and all stored bookmarks will show up in user's blogs.