This paper examines recent changes in the teaching of Tamil in Singapore to students from Tamil language homes. Tamil is a diglossic language, with a formal or H variety that is used mainly in writing and is learned in schools and a spoken or L variety that is used in informal conversations and is learned naturally through exposure. Standard Spoken Tamil (SST) is the variety used by educated Tamils regardless of their caste or region in Tamil Nadu. Following the review of the Tamil language curriculum and pedagogy in 2006 by the Ministry of Education, Singapore (MOE), a Standardised variety of Spoken Tamil (SST) has become a key feature of Tamil language syllabus since 2008. This paper is based on a qualitative analysis of 18 primary school Tamil lessons and interviews with the participating teachers to understand: (a) the impact of introducing SST in Tamil classrooms; (b) the reactions of the teachers; and (c) those of the students to the lessons and techniques