The purpose of this paper is presenting 2 examples of using English to teach history and economic subjects in universities and colleges. Another goal of this study is that we aim to enhance teaching quality in schools, colleges and universities through case teaching methods which can help students to expand discussion via open mind method. Al-Issa (2006) stated that for five decades there is an important international activity, that is English language teaching (ELT), which became a big business. And dominated by USA, it shows that English roles has been increasing on the world arena in the postcolonial/neocolonial age. For using English to teach History subjects we have to not only catch the historical terms and topics very well but we also combine language teaching with images, ICT tools, LCDs with effective history languages. For using English to teach economic subjects, we have to note there are key economic terms for each economic subjects as well as practice speaking and listening very often in order to deliver effective messages to students and facilitate effective communication inside classrooms. Huy, D.T.N., Hanh, N.T.T, Thao, N.T.P et al (2021) mention there is psychological and pedagogy issues when teaching at schools. We present a typical case teaching in economic subject: analyze stock price and beta CAPM determinants in a single case study of Vietinbank -- CTG in Vietnam financial market during operation period 2011-2020. Next, we will present a case teaching in Indonesian revolution for history subject. Authors also present a process of applying English in teaching history and economic via 2 specific case examples.