Once you start adding work to your digital portfolio on your blog page, you will need a way of sorting it into categories. WordPress allows you to assign a post to different categories – you should have a category for each subject.
So that readers can easily navigate through the different categories and find particular posts, you should create a custom header. This can have categories added to it, so that posts will be easily found under the heading. For example, clicking on Maths will display all of the posts in the Maths category.
So how is this done?
1. Make sure that your posts have at least one category (not just uncategorised). You can create the catetgories by clicking on Posts > Categories
2. Create a custom header (Appearance > Header) and use this header for the main navigation.
3. Add your categories to the custom header.