If you are looking for a kite surf school there are some tips that may be useful. The first thing you have to ask your school is how many learners will every teacher have, maximum one teacher per two students is acceptable (during the high season there may not be enough teachers available). The second thing to ask is if your school has a good selection of sails and wet suits (most of the schools in Tarifa do have good material, though). Third, make sure your school has been open several years, and that they know the local winds (look online forums for information about the selected school). If you do not speak English, make sure your teacher will be fluent in English. And last tip, if you can, take private lessons, you will learn much faster.