: The aims of this research are to describe: (1) the types of speech acts are used by teachers in classroom learning Indonesian VIII F SMPNegeri 2 Kebakkramat Karanganyar, (2) Pragmatic power contained in the speech act Indonesian teacher class VIIIF SMP Negeri 2 Kebakkramat Karanganyar. This research method is descriptive kualititatif. Data sources used are documen, events, and informants. This study use is triangulation of data and methods. This study uses a model that consists of an interactive analysis of data reduction, data display, and conclusion. The results of this research is: (1) the typeof speech act learning Indonesian teachers in class VIIIF SMP Negeri 2 Kebakkramat Karanganyar, ie speech acts locutions, ilokusi speech acts, speech acts perlokusi. Ilokusi speech act consists of (a) representative speech act consisting of states, and the mentioning; (b) directive which consists of speech acts ordered; (c) commissive consisting of speech acts promised; (d) consists of expressive speech acts criticized and praise; (e) a declaration that consists of speech acts prohibited and decide. (2)Power pragmatic speech actis realized through a directive, contained in the speech act Indonesian teacher in class VIIIF SMP Negeri 2 Kebakkramat Karanganyar very strong against the students, namely: (a) provide information, (b) affect (c) ordering, (d) reprimand, (e) criticize, (f) suggests, (g) praise. (h) determine, (i) quip, (j) scolded.