Thank you Sid and Rutabaga for your answers. I followed your advices and asked a recruiter at schooll to "fix" my cover letter. I'm teaching only in english since 21 years now, from Universities in USA to schools in asia or in the gulf and I never had any problem of understanding from my students. The only time was when I was teaching In Columbbia University in New york and students were recording me, and the voice recognition didn't work onmost of my words...lol.. I don't even speak french at home as my wife and kids just speak english...but I still have 1% of answers..

here is the updated cover letter:

Dear Sir/Madam,
I am writing in response to the employment opportunity available on your website.
I am a qualified Math Teacher with 18 years of experience, currently teaching at Aqaba International School in Jordan. I am now looking to work for a unique School where I can use my expertise to further educate ambitious students.
I have a strong educational background where I studied Mathematics and Computer Science at the Universities of Grenoble, Lyon and Chicago. I hold a Ph.D. in Applied Mathematics and a Ph.D. in Computer Technology and Programming Language. I earned the Aggregation (Middle/High School and University credential) which is the highest level that you can hold to Lecture in France.
I taught 5 years in the South of France before joining the faculty at the Lycée International de Los Angeles. I then taught the Middle and High School French and IB program at San Diego (SDFAS). My next position was at the Lyceum Kennedy in New York where I taught the International Baccalaureate to IB1 and IB2 standard and higher level.
I married a South African woman 6 years ago and subsequently moved to Johannesburg, South Africa, where I taught the IB Diploma and Cambridge IGCSE. Working in South Africa was very difficult and as such I decided to go back to work in international education. I gained further valuable experience in Indonesia (IGCSE for grade 9 and 10), China (grade 7 to 12) and Egypt (IB1 and 2 high level).
I believe that my experience and education make me a strong candidate for this particular opportunity in teaching. I have vast experience in international positions where I have been exposed to the IB and the IGCSE curriculum in addition to teaching practices from many different cultures. I believe that this blend of experience will make me a valuable asset to your team.
As requested I am enclosing my resume along with referees and a recent passport photo.
Please feel free to contact me via telephone, email or Skype (ID is xxxxxxxxxxxxxxx) should you require additional information.
Thank you for your consideration and time and I look forward to hearing from you soon.
Yours Sincerely,
Olivier Attias Ph.Ds.

Thank you Sid and Rutabaga for your answers.

Thanks Dredge, but just FYI, I'm teaching since 18 years in English, in International schools and universities all over the world and I never have complain about my English...my concern was, why I have only 1 or 2 offers a year with my resume and not more...

Yes, I knew that posting on that forum will be a good thing to do...That is the suggestions I was waiting for.
Thanks a lot Psyguy for your time answering me.
suggestion 1 - I worked in some international FS, international lycee (in los angeles, NY, Johannesburg) and unfortunately, the salary range is far from what I earn today in International school, and they don't offer benefit at all. (when I asked how it works once to a HR in FS, he answered me, very easy : you will find many taxis at the airport, go to town, find an hotel, back to school is the 28th of august, bye)
suggestion 2 - I applied to International schools in France, and in Franch speaking countries, thinking it will be better for me as they were asking for a teacher who can speak french and english with knowledge of French syllabus and IB/Igcse, and I never had answers (that's why I posted on that forum, what is the pb?)
suggestion 3 - an exam again? at my age....not sure I will have the patience to prepare it..
suggestion 4 - some schools especially in the gulf quite like the fact to have a Dr as a teacher to present to their parents and I got some jobs because of it....I'm scared that if I downgrade my resume I will still have opportunities
suggestion 5 - that sounds very good....how can I do?

maybe we can continue that talk on a more private way than that forum? what do you think?

Thanks a lot for all that constructive suggestions, and for the time you spent with me, really appreciate!!

Wish you a great evening

wow, Ok, thanks to be franck..

at least I know that something is going wrong.. Btw I'm caucasian, and I will turn 48 next month...

my credential is a french aggregation, (from the national education) which allow you, In france, to teach math from 6th to 12th, and I have and extension to work in university.
I actually taught all my career in middle and high school..
As most of the school only offer a 1 or 2 years contract I though that saying that I still have 6 years to work will show them that I really want to stabilize...
So, what are your advises?
must I give my age on the cover letter? I will take off that part about still have 6 years to work..
must I add that my credential and experiences cover middle and high school? what else?
thanks for your help,
Looking forward to hearing from you

Thanks for your answer,
My resume and cover letter are in english and were done by specialist agencies with "natural" born english...
I'm teaching since 21 years in english only and quite franckly start to loose my french as i never practice...

here is my cover letter if you have time to put a look at it:

Dear sir/Madam, I hope you have a good day,

I'm writing in response to the employment opportunity available on your website. Hence I'm very interested in the position,
I am a qualified maths teacher with 18 years of experience, currently teaching at ........ International school, in ........., I still have 6 years to work and I am looking for a unique school to end my career.
Originally from Rhône-Alpes in France, I studied Mathematics and Computer Science at the Universities of Grenoble, Lyon and Chicago. I holds a Ph.D. in Applied Mathematics and a Ph.D. in Computer Technology and Programming Language, I earned the Aggregation (High School and University credential which is the highest level you can have to Lecture in France) in mathematics. I taught 5 years in the south of France before joining the faculty at the Lycée International de Los Angeles then San Diego (SDFAS) where I taught the IB program in Middle and High school.
Then, I joined the Lyceum Kennedy in New York where I taught the International Baccalaureate to IB1 and IB2 standard and high level.
I married a South African woman and moved then to Johannesburg, South Africa, where I taught to different institution the IB Diploma and the IGCSE. Working in South Africa is very difficult, so I decided to go back to work in international positions, Like Indonesia (IGCSE), China and Egypt (IB1 and 2 High level).
I personally believe that my experience and education make me a strong candidate for this particular opportunity in teaching. Thanks to the different international positions I have been exposed to, ranging from USA to asia, I have gained experience in the IB and the IGCSE curriculum and the management of all different cultures.
As I know, these skills are appreciated by your organization, and therefore I believe I will be a valuable asset to your team. I really think that my combination of experience, skills and knowledge suit your expectation regarding the profile for the advertised position.
As requested I am enclosing my resume along with referees, and a recent passport pic.
Please feel welcome to contact me via telephone or email should you require additional information.
Thank you very much for your consideration and time,
Looking forward to hearing from you
Kind regards
Olivier Attias Ph.Ds.

Thanks a lot for your time and reply

Thanks for your answer,
along the years I registered with search associates, and applied to like 35 offers, and actively looking on TESonline and other teachers websites, I spent hours to fill my profile on tenth of website and apply to lots throught all of them...but visibly schools don't even aknowledge for reception of my file most of the time...
I'm not especially talking about now but the last 18 years for me was sending 100 cv and got 1 offer, sometimes 2, the lucky years...
Fortunately i never stayed without a job, but I'm still thinking that something must be wrong or done better to have more opportunities with my experience in 6 different syllabus in math and my PhDs..

Hello, I just have a question, am I too much qualified or is there really something I'm doing wrong??
Let me explain: I have 2 PhDs, the first in applied mathematics and the second in computer science from high known university in europe, and now around 21 years of experience and 18 in international schools..I was mostly HOD in math or ICT and I'm specialist in IB and IGCSE curriculum...every year is the same pb, I apply to hundreds of positions and in the best case I have 2 offers, but most of the time only 1..so what is the problem? I'm sure most schools don't even rear my resume as I receive a lot of sorry but you don't have the required experience/qualification for this role...Is it because i'm french? (I left france in 1989 and live in South Africa since)
Can someone explain to me what i'm doing wrong?

Thanks a lot for your patience and time...

Dr Olivier Attias