Creating your own filter is a way of linking images together and developing a photographic style.
Photshop has pre-set filters such as blur noise or even water colour. Try to steer away from these when creating your own filter.
After a demonstration from your teacher, choose a photo and develop your own filter from a series of intentional small steps in Photshop.
Repeat the filter on two other chosen photographs to link them together.
Post them to your blog.