Hello, "For people who want" is correct. Regardless of the context...

standard rule is when the subject is in 'singular form' the verb ends with letter "s"; while in 'plural form', the verb remains the same. in your example, 'people' is in the 'plural' form and thus, the verb remained to be the same (want). if you want it to say in 'singular form', you should go this way: "for an individual who WANTS to improve their english" :)

without more context it is hard to say but genrally i would say for people who want..ie this product is perfect for people who want an easy life

romulus, the word People has different meanings. And "for an individual who WANTS to improve their english" - hm.... indivdual-who wantS-ok. but that means only one person, so why do you suggest using "THEIR"? Agree with Glen can give the extract from the book on English grammar if still needed ;)

"for people who want"