#### Why is scientific blogging so important? Is it really true that scientific blogging matters? Erica M. Brownstein and Robert Klein, both with solid reputations as science educators, have long been convinced of this, as their article “Blogs: Applications in Science Education”, published as early as 2006 in the Journal of College Science Teaching demonstrates. “Education is affected by blogs because of their potential for learning and teaching, and also their risks” they state. They are also strong advocates of using blogging as a tool for improving student engagement in science classes. What about the spread of educational blogs on polymer science and technology? Can they represent an added value? Years of experience participating in seminars, laboratory activities and meetings with students of various levels teaches us that polymer science always arouses great interest and many curiosities, as there are so many burning issues regarding the use of plastics and particularly the effect of plastic waste dispersed in the environment on ecosystems and human health. On the other hand, surfing the internet it seems that there is a bit of confusion even on the basic concepts of polymer science and some communications or posts are not scientifically rigorous. Therefore, we made up our mind that it would be useful to make our contribution by posting a series of short articles focused on education on polymer science in the form of “knowledge pills”. We intend to start with very basic concepts, necessary for addressing more complex aspects of the behavior of polymers that normally capture the interest of readers. To make it easier to follow the logical development of our posts, we've decided to number them so they can easily reference each other. That said, we hope to be of help to young students or teachers or anybody else that is interested in knowing more on polymers.