At the same time, one should not ignore their mother tongue also. These days we are seeing many people who are ignoring their mother tongue in the quest to learn English. That is also not the correct way. They should concentrate on their mother tongue also. At least proficiency in two languages is a requirement.
There are many ways to learn the language. The same procedure can be followed for any language. Reading books and newspapers is one way. Hearing the radio programmes in the language you want to learn and viewing TV channels of that language are some of the methods. Conversing with others in that language is one way to improve our skill in that particular language.
If the child has to learn English, the effort should not only be from the teacher but also from the parent. Now, you may be thinking, how can an illiterate parent accomplish such goal? So they have to use media, put on English news, watch conversations in English, listen to songs in English, listen to audios of books read in English available on google. This will be helpful to build language at an early age.
Lead the leader
"Life is easier when you enjoy what you do"