Assalamu alaikum. I am an experienced mentor of Online Sohopathi for last 3 years. I enjoy to discuss physics,math with students rather than giving only theoretical reference. Because I want to give the real time experience of science to listeners. You better see science than reading. Also I enjoy learning new things from everyone. Want to take me as a mentor? Call at Online Sohopathi's office(09638224477). They will make you reach to me.