As a Science Teacher that has her students keep an Interactive Science Notebook (ISN), I couldn't be more pleased with these Yoobi notebooks. The quality is top notch. The poly cover helps keep the notebook intact over the course of the year. In addition to this, there is a hard cardboard back cover which is so much more durable than the thin cardboard backs on other notebooks. Again, this equates to durability which is essential when dealing with Middle Schoolers! Also, I love that the notebook is FULL SIZE (8.5"" x 11""). This means much less resizing to fit things into the ISN as well as less time (and mess) cutting and gluing things in. There are 100 pages, as opposed to the standard 70, so one notebook can cover the entire year of learning. In the front (just behind the poly cover) there is a high-quality pocket page with a pocket on both sides of the page! I love this notebook and HIGHLY recommend it, in fact, I demand that my students use this notebook and this notebook only!