This academic proposal is relevant; students will improve their pronunciation of interdental fricative sounds (/θ/ and /ð/); there will be activities that are created in Genially program based on the Audiolingual Method; teachers and students will become aware of all those strategies that will help them not to mispronounce these two interdental fricative sounds.  Since in Spanish these two sounds are not found, they cause trouble to student's correct pronunciation of them; so, this is why the activities provided in this proposal are intended to encourage students to pronounce correctly the interdental voiced and voiceless sounds.