Okayama Public High School Entrance Examination - Mathematics

Students finishing junior high school in Okayama who are applying to a prefectural public high school. It forms part of the entrance selection for those schools. Applicants to national or private schools sit different examinations, and each public school may set additional requirements, so check the details for your chosen school.

Expect a written paper combining multiple-choice and short-answer items with constructed-response questions. The longer items typically ask you to justify a result, complete a proof, or explain your reasoning in writing. The official prefectural education board publishes the current structure, so confirm it there rather than relying on older descriptions.

Those figures are set for each year's administration and are announced by the official body. This page does not quote them because they change. Check the current guidelines from the Okayama Prefectural Board of Education, and note that weighting within the overall selection may also vary by school and course.

Most items test standard junior high content and are manageable with solid fundamentals. The difficulty comes from the last constructed-response questions, which combine topics and demand a clear written argument. Losing marks there usually reflects incomplete reasoning rather than unfamiliar mathematics, so practise explaining steps precisely.

Retake and reapplication rules are set by the official administration each year and differ from ordinary school tests. There is no general right to resit. Read the current selection guidelines from the prefectural education board carefully, and discuss options with your junior high school guidance teacher before making decisions.

Start with calculation and algebraic manipulation, since errors there contaminate every other topic. Then move to functions and graphs, followed by geometry and proof, which need the most sustained practice. Add data and probability alongside, and finish with mixed past-paper work that trains you to explain answers in writing.

Sit a full paper under timed conditions without notes, then mark it strictly, including your written explanations. Group your errors by topic rather than by question number. Redo the same paper after a few weeks; if the same topic still fails, return to textbook examples before attempting more papers.

Three patterns dominate: arithmetic slips under time pressure, geometry answers that state a conclusion without stating the reason, and explanations that omit the condition being used. Writing 'because triangle ABC is isosceles, so the base angles are equal' style sentences in practice builds the habit needed for constructed-response items.

No. Your school textbooks, the prefectural past papers, and a notebook for rewriting incorrect solutions cover the content. Tutoring can help with explanation writing, but the decisive factor is regular, self-marked practice. Confirm any published past papers through official prefectural sources rather than third-party copies.