Usage of scientific calculators varies by country or region. Casio has developed an original teaching material to improve the situation of "I have never used a scientific calculator", "I use it but it is limited", and "I am not using it correctly". It covers all units of high school mathematics and supports the introduction and use of scientific calculators. Students will have a proper and thorough understanding and mastery of scientific calculators, which will deepen their understanding and interest in mathematics. For teachers, it is a supplementary material to learn how to use a scientific calculator, which is necessary for the next class.