There really are some great Spanish language schools in Valencia, but of course wherever you go you will also find those which are not held to so high a standard. Many people are opportunists and may seek to set up temporary Spanish schools in Spain on the basis of earning large amounts of money without actually having the qualifications, experience, or knowhow required to run lessons, so you need to be careful and make sure that you pick a top level school when you learn Spanish Valencia style.
That does not mean to say of course that you will automatically be able to tell the good Spanish language schools from the bad, since after all you would expect all of them to claim to be the best whether that is the case or not. In order to identify them, then, you should look for certain characteristics that are normally displayed by those of a good standard. The first thing is longevity in the business; if a school has been around for fifteen or twenty years then you might be able to trust them more than a new enterprise, since word of mouth can be very destructive to bad businesses and they will not be able to stay open for long.
There are certain things that should be looked for in the teaching staff, too. Look to the information page of the don Quijote Spanish School to find a good example – they guarantee that all teachers are native speakers, and that they have university degrees to prove their own level of education. This means that you be sure that you will be taught by someone who is an expert in the language, and is therefore well equipped to pass the knowledge on to you with skill and finesse. You are also looking for a certain type of course that uses the most up to date methods and will give you the best chance of learning quickly; though there may be a huge range of programs at the Spanish schools, you will nonetheless find that every single one of them uses immersive techniques, proven to be the most effective and rapid form of language study. If there is no immersion on offer, then the school clearly do not understand the best way to teach the language and will not be able to help you.
Do not allow yourself to be distracted by flashy promises and extra offerings, but remember to focus on the above requirements. While it might be nice to have a full program of Valencia excursions to choose from, it will not help you to learn as much as a good set of lessons will. Keep in mind that your key focus when attending Spanish language schools is learning the language to a good level, so make that your number one priority and only use other parts of the package as a deciding factor when you have already ascertained that the courses will be of a good standard.