The Klett Lern­trai­ning brand stands for learn­ing aids from kin­der­gar­ten to u­ni­ver­si­ty. The ti­tles cov­er the es­sen­tial ap­pli­ca­tion sit­u­a­tions of ref­er­ence, prac­tice, test­ing and ex­am prep­a­ra­tion in all grades, core sub­jects and school types. The in­ter­lock­ing learn­ing sys­tem and the learn­ing con­tents stand for the high­est ped­a­gog­i­cal com­pe­tence, the prod­ucts for high qual­i­ty and in­no­va­tion.