From Thusis, which had become German-speaking in the 16th/17th century, the Heinzenberg and Domleschg valleys were gradually Germanized over the next decades. Around the turn of the century, the inner Heinzenberg and Cazis became German-speaking, followed by Rothenbrunnen, Rodels, Almens, and Pratval, splitting the Romansh area into two geographically non-connected parts. In the 1920s and 1930s the rest of the villages in the valley became mainly German-speaking, sealing the split. In order to halt the decline of Romansh, the Lia Rumantscha began establishing Romansh day care schools, called "Scoletas", beginning in the 1940s with the aim of reintroducing Romansh to children. Although the "Scoletas" had some success – of the ten villages where Scoletas were established, the children began speaking Romansh amongst themselves in four, with the children in four others acquiring at least some knowledge of Romansh – the program ultimately failed to preserve the language in the valley. A key factor was the disinterest of the parents, whose main motivation for sending their children to the Scoletas appears to have been that they were looked after for a few hours and given a meal every day, rather than an interest in preserving Romansh. The other factor was that after entering primary school, the children received a few hours a week of Romansh instruction at best. As a result, the last Scoletas were closed in the 1960s with the exception of Präz, where the Scoleta remained open until 1979. In other areas, such as the Engadine and the 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.