Juku is a type of private tutoring school in Japan that provides additional educational support to students. These schools often focus on subjects like math, science, and language, helping students prepare for entrance exams or improve their academic performance. Students typically attend juku after regular school hours, allowing them to receive personalized attention and tailored instruction. The environment is often more relaxed than traditional classrooms, fostering a space where students can ask questions and engage with the material more freely.