Six pages is approximately 1500-1800 words. Decide on a bigger subject. Find a great deal of research. Do write in a succinct manner, but fill the pages with details, justification, and evaluation. Do not think about it as a more paper, however as a deeper newspaper, using a wider base of understanding to be shown to your teacher.
Aside from this, a 6 page paper is written exactly the exact same manner as a two page paper. The distinction is that rather than creating a stage in 1 paragraph, you might have to spell out the finer details in greater detail, with several paragraphs.
I propose making a summary or a brain map so you are able to capture and organize your thoughts on your native language before you begin writing.
Do not write long, fuzzy paragraphs, because that won't improve your quality. Do not be repetitive. A very long essay needs more stuff, so do further study and do more considering the context and the significance of this topic.