I have been teaching my son's classmates for almost one year for free. I help them with their English learning twice a week. Because around me, no one teaches for such a long time without payment, people say that I should take money. I replied that I would never charge anything. Recently, the students scored higher at school and their parents now thank me. Sometimes they even give me their countryside eggs, snacks or home made yogurt... I am so happy to see how much they appreciate my work, and the food is good. I feel like my hard work has paid off. I prefer "English learning" to "learning English" because the former is simpler, with "English" as an adjective and "learning" as a noun. But, both are correct.

I have been teaching my son's classmates for almost one /a year for free. I help them with their learning English twice a week. Because around me, no one teaches for such a long time /for so long without money /being paid so people say that I should take /accept /ask for money (from them). I said I never charge them anything /any money. Recently, they got higher scores at school and their parents now thank me /give me "thanks" and sometimes give me their countryside /home-grown* eggs, some snacks or home-made yogurts... I am (so) happy because I can see how much they appreciate my work /effort, and the food is good. I feel like my hard work has paid off. *I presume you mean from chickens they keep themselves [rather than bought from the shop].