Hi,
I think teaching EFL/ESL vocabulary well is one of the most difficult things to do. Reportedly, the most successful techniques involve cognitive learning. I think it's important to focus on what students intend to use their English for, i.e. Is it for translation? Written correspondence? Oral communication? Passing exams to get a certificate for university/a job? etc.
Personally, I believe in an integrated approach and I think a well designed EFL/ESL course book will teach vocabulary effectively, mainly for the following reasons:
1. We learn and use language in contexts (i.e. our interaction with the world around us) - we need a strong, obvious context to learn to use a new word/expression correctly. Books tend to group language into contexts.
2. Words themselves derive their meaning, tone and connotation from their collocation with other words. I read a book, not so long ago, that claimed that a mere 200 words make up 50% of all spoken and written English. Obviously, those 200 words can express more than 200 meanings!
3. A picture says a thousand words - e.g. It's much easier for most people to understand the concept of the object 'lemon' by looking at it or at least a photo of it. - Books usually use photos wherever possible.
4. In most cases, students need to learn the correct pronunciation and stress, and also the correct rhythm and intonation when using the word in a sentence. Good EFL/ESL course books usually have pronunciation exercises and accompanying CDs or CD-ROMs for practice.
Also, I think it's important to prioritise language learning. Less is more, as they say. I aim to teach my students around 1,000 new words per year. I'd rather they learned to use 1,000 words correctly, with natural pronunciation, intonation, stress, connotation, confidently and fluently, than have them struggle, stumble and continuously make mistakes with 2,000 or 3,000 new words. I've read that the average native speaker uses around 6,000 to 12,000 words (Shakespeare reportedly used around 25,000 in his written body of work). So I think it's possible to teach students to speak English well (CEF B2 "independent user") in four or five years if they attend at least 3 hours of class per week and do around 1-2 hours of homework.
With this in mind, I think good course books 'should' limit and clearly identify target language and establish clear contexts where it is used. Personally, I wouldn't try to make up a vocabulary course, I'd much prefer to use an integrated course that treats all areas of the English language in a consistent and balanced way.
I hope that answers your question!
At the moment, I'm using Cutting Edge and New English File course books. I like them!
