Try this unique approach to teaching/reinforcing Ser x Estar. My Clicker/Powerpoint Activity can be used with Turning Technologies or on its own. I teach a snappy formula/chant for the uses of Ser x Estar, and this activity begins with an audio explanation on the first slide, followed by two slides detailing the information with real language examples, all in the present tense. The answer key can be found at the bottom of each slide in the Notes section. My students never forget this formula and it has really improved student understanding of this pesky grammatical concept. Enjoy!