Our daughter needed for teaching mathematics 8th grade a calculator should support various technical and scientific basic functions. Due to experience during my own school days and education, was for me the first choice of a computer Casio. The robust feel of the computer is as expected absolutely great. The keys have a reasonable, not at fixed pressure point and thereby prevent accidental mistyping. The necessary technical and scientific basic functions are applicable for the whole school more than required and available with a simple syntax. All in all, offers the Casio FX-82DE Plus a top price-performance ratio.