In this small phonetics class Zlata will teach you how to pronounce two sounds: C [s]  and Ш [sh]. Listen and practice saying this tongue twister about a little girl named Sasha who was going along the avenue and sucking sushka:

Шла Са́ша по шоссе́ и соса́ла су́шку [shla Sa-sha pa sha-sse I sa-sa-la sush-ku] 

Learn more about Russian Phonetics (on-line lecture)