Abstract
The purpose of this project is to research and develop the appropriate learning environments for children at the introductory level in elementary schools. The aim of this paper is to clarify through pilot lessons whether the "halbschriftlichen Rechenstrategien" is adequate to the second grader in elementary schools. The learning environments for the pilot lessons were designed based on the basic ideas of "Das Zahlenbuch" (Wittmann/Muller; 2004). The most of the children could choose the good ways of calculation and could calculate the tasks of addicion by the end of the lessons. Such the facts from the pilot lessons tell us that the halbschriftlichen Rechenstrategien is usefully the second grader children in elementary schools.
