The study is devoted to how English is studied by students whose language of instruction is Kazakh or Russian. I use administrative data from a rural school to explore differences in English achievement, proficiency, and classroom behavior of students who study in Kazakh and in Russian. My findings show that there are small gaps in these three aspects. While Kazakh-language students tend to have higher achievement grades, their proficiency is not much higher than that of Russian language students. Classroom behavior-wise, Kazakh language students talk less during class compared to their Russian language counterparts.