The free app "Schulwissen handy" by Schulbuchprofi Westermann is an indispensable companion for anyone who wants to quickly and easily look up the most important topics in classes 5 - 10. The material of a total of 9 school subjects is covered: formulas, equations, functions, area calculations u.v.m. in mathematics and the natural sciences; Spelling, punctuation and grammar in German; the main grammatical rules in the foreign languages ​​English, French, Spanish and Latin. All rules and technica