Dear Wahab
It seems that you are hiding something even with your uncle shine about your studies. You must have told everything so that it would be easier to solve your problem. You had better take full interest in your studies and if there is any difficulty in understanding the concept don't be shy to tell it to your teacher; he will really help you when you ask him individually requesting him to give you some time. And ultimately your mother will also be happy when she would see you taking interest in your studies. Insha Allah