I teach English in a government school where the medium of instruction is both English and the regional medium Telugu. The slow learners opt for Telugu medium and they are not able to follow my English unless I resort to the regional medium while teaching English
Some English scholars say that mother tongue can be used judiciously. What is judicious is difficult to define or decide.
My question is, whether the use of mother-tongue in the English class is a boon or a bane?