Yotsuya Otsuka Pre-Study Series Science & Social Studies 4th Grade, Volume 2, Lessons 8 & 9 Study Cards. Each card contains a question, allowing you to study from basic to advanced levels. These cards can be used for placement test preparation and to reinforce weaknesses right before the entrance exam. I purchased these, but they were not used for homework at the cram school, so they are almost unused. Springs, Running Water and Topography Topography Created by Mountains and Rivers, Japan's Climate There is a scratch on the cover of the Social Studies Lesson 9 card from storage.