A vocabulary learning-optimized word card set with a ring, convenient for carrying around. - Contents: Set of word cards - Science - Ring: With a ring for easy carrying - Usage: Vocabulary learning Thank you for viewing. I believe this is a memory card I received during the 7-crown special training at Hamagakuen. All are science terms. The sticky notes indicate the content of the word cards. There are about three that are not written on, but they are in the biology field. It was useful on the train during my exam period. All are held together with a ring. There are stains, wear, and folds. Thank you for your understanding.