This is a development text used in the NICHINOKEN 4th grade advanced class summer course. Subjects included: Japanese, Math, Social Studies, Science Includes answer key and explanations. NICHINOKEN Special Selection Course: Science The Advancement of Scientific Thinking NICHINOKEN Special Course: Japanese The Door to Narrative Texts This item was actually used by a child, so there may be writing (pencil, highlighter), stains, and folds. Please understand that this item has been stored at home by a non-professional. If you purchase multiple items, we can offer a discount, so please contact us.