User:Borisovich/Sandbox

and elementary algebra taught concurrently. The degree of rigor was set: in Germany by Felix Klein  to  Starts with arithmetic and is followed by Euclidean geometry and elementary algebra taught concurrently. Requires the instructor to be well informed about elementary mathematics, since didactic and curriculum decisions are often dictated by the logic of the subject rather than pedagogical considerations. Other methods emerge by emphasizing some aspects of the conventional approach.
 * Conventional approach - the gradual and systematic guiding through the hierarchy of mathematical notions, ideas and techniques, starting from arithmetic and usually followed by Euclidean geometry