Surselva, where the pressure of German was equally strong, Romansh was maintained much better and remained a commonly spoken language. According to the linguist Mathias Kundert, one important factor was the different social prestige of Romansh. In the Heinzenberg and Domleschg valleys, the elite had been German-speaking for centuries, so that German was associated with power and education, even though most people did not speak it, whereas Romansh was associated with peasant life. In the Engadine and the Surselva by contrast, the elite was itself Romansh-speaking, so that Romansh there was "not only the language spoken to children and cows, but also that of the village notable, the priest, and the teacher." Additionally, Romansh schools had been common for several years before German had become a necessity, so that Romansh was firmly established as a medium of education. Likewise, in the Upper Engadine, where factors such as increased mobility and immigration by German speakers were even stronger, Romansh was more firmly established as a language of education and administration, so that the language was maintained to a much greater extent. In the Central Grisons, by contrast, German had been a central part of schooling since the beginning, and virtually all schools switched entirely to German as the language of instruction by 1900, with children in many schools being punished for speaking Romansh well into the 1930s. Rumantsch Grischun Early attempts to create a unified written language for Romansh include the Romonsch fusionau of Gion Antoni Bühler in 1867 and the Interrumantsch by Leza Uffer in 1958. Neither was able to gain much support, and their creators were largely the only ones actively using them. In the meantime, the Romansh movement sought to promote the different regional varieties while promoting a gradual convergence of the five varieties, called the "avischinaziun". In 1982, however, the then secretary of the Lia Rumantscha, a sociolinguist named , launched a project for designing a pan-regional variety. The linguist Heinrich Schmid presented to the Lia Rumantscha the same year the rules and directives for this standard language under the name Rumantsch Grischun (Rumantsch Grischun: rumantsch grischun). Schmid's approach consisted of creating a language as equally acceptable as possible to speakers of the different dialects, by choosing those forms which were found in a majority of the three strongest varieties: Sursilvan, Vallader, and Surmiran (Puter has more speakers than Surmiran but is spoken by a lower percentage