The document discusses the importance of using a child's mother tongue in early primary education. It summarizes research showing that students who learn basic reading and writing skills in their native language perform better later in school compared to those who only learn in a second language. The document also notes that many skills developed in the first language, such as reading, can transfer and help with learning a second language. It advocates for making education available to children in their mother tongue by ensuring schools have teachers who speak the local language and by developing textbooks and materials in that language.