Thank you for viewing. This is a set of educational materials including the Grammar I and II of the Light Path series, with English answer keys and explanations. There are no writings on the problems themselves, but as shown in the photos, there are some pages with markings on the key points pages. - Series Name: Light Path - Grammar: Grammar I - Grammar: Grammar II - English: Light Path English - Publisher: S-CUBE These were distributed at a cram school, but I am selling them now that I have finished using them. Although they are unused, please understand that they have been stored by a private individual, so please purchase only if you are comfortable with this. Discounts are available. Individual sales are available. I also accept sales of the explanations only, so please feel free to comment.