Lake Forest Country Day School (LFCDS), founded in 1888, is a coeducational, independent preK-8 school located on a 29-acre campus in Lake Forest, Illinois, USA, a suburb approximately 30 miles north of Chicago.
 The School serves families from more than 34 communities.
 The School is affiliated with the Country Day School movement and is a member of The National Association of Independent Schools, The Independent Schools Association of the Central States, The Lake Michigan Association of Independent Schools and The Secondary School Admission Testing Board.
Jerudong International School (Abbrev: ) is a co-educational, boarding and day school in Brunei, and one of the few international schools in the country.
 Jerudong International School offers UK education from nursery to sixth form, culminating in the A Level examination.
 The school is affiliated to several British school organisations such as the Headmasters' and Headmistresses' Conference ( ), the Federation of British International Schools in Asia ( ) and the Boarding Schools' Association ( ).
 Jerudong International School first opened its doors for primary education in January 1997 and subsequently for secondary in October in the same year.
The Society of Heads, formerly the Society of Headmasters & Headmistresses of Independent Schools (SHHIS), or "S of H", is an association of Headmasters and Headmistresses of various types of independent schools in the United Kingdom, and was formed in 1961.
 Members include heads of single-sex and co-educational day and boarding secondary schools, specialist music, dance, and performing arts schools, and special schools for children with learning difficulties.
 The association's headquarters are in Market Harborough, in Leicestershire, England.
Huntingtower School is an independent, co-educational, non-denominational, day school and boarding school, located in the eastern Melbourne suburb of Mount Waverley, Victoria, Australia.
 The school currently caters for approximately 730 students from pre-prep to Year 12.
 Huntingtower is affiliated with the Association of Heads of Independent Schools of Australia (AHISA), the Association of Independent Schools of Victoria (AISV) and is a member of the Eastern Independent Schools of Melbourne (EISM).
 It is a member of the Victorian Ecumenical System of Schools (VESS).
Marlborough College is an independent boarding and day school in Marlborough, Wiltshire, England.
 Founded in 1843 for the sons of Church of England clergy, it is now co-educational.
 For the academic year 2015/16, Marlborough charged £9,610 per term for day pupils, making it the most expensive day school in the Headmasters' and Headmistresses' Conference (HMC) – the association of British independent schools.
 Fees for full boarders are up to £11,310 per term, the 28th most expensive HMC boarding school.
The Independent Schools Inspectorate (ISI) is an organisation responsible for the inspection of independent schools in England which are members of organisations affiliated to the Independent Schools Council (ISC).
 It is one of three independent schools inspectorates empowered to carry out inspections through an agreement with the Department for Education (DfE).
 As of January 2012, ISI also inspects all boarding school welfare provision for the schools within its remit, making it the largest inspectorate of school boarding provision in the UK.
 ISI's work is monitored by Ofsted on behalf of the DfE.
 Independent schools which are not members of the ISC are mostly inspected by Ofsted but some are inspected by the Schools Inspection Service (SIS) or Bridge Schools Inspectorate (BSI).
 ISI is a DfE approved inspectorate for British Schools Overseas and provides education services, including inspection, in all the continents of the world except Antarctica and Australia.
Windermere School is an independent, co-educational boarding and day school in the English Lake District.
 It has approximately 400 pupils between the ages of 3 and 18, a third of whom are boarders.
 This day and boarding school was established in Windermere in 1863.
 It has three campuses: Elleray for children aged three to 11, Browhead for those aged 11 to 18, and Hodge Howe, an RYA (Royal Yachting Association) accredited Water Sports Centre on the shores of Lake Windermere.
 Elleray and Browhead are approximately two miles apart.
 In 2010, the school changed its name from Windermere St Anne’s School to Windermere School.
 It is a member of Round Square and the Society of Headmasters & Headmistresses of Independent Schools.
 The Good Schools Guide describes Windermere as 'a school which revels in a hearty approach to everything from academia to friendships'.
Ardingly College is a selective co-educational boarding and day independent school near Ardingly, West Sussex, England.
 The school is a member of the Headmasters' and Headmistresses' Conference and of the Woodard Corporation of independent schools and as such has a strong Anglo-Catholic tradition.
 It began as a boarding school for boys, and became fully co-educational in 1982.
 For the academic year 2015/16, Ardingly charged day pupils up to £7,710 per term, making it the 29th most expensive Headmasters' and Headmistresses' Conference (HMC) day school.
 It is a public school in the British sense of the term (i.e. fee-paying).
The Headmasters' and Headmistresses' Conference (HMC) is an association of the headmasters or headmistresses of 283 independent schools (both boarding schools and day schools) in the United Kingdom, Crown dependencies and the Republic of Ireland.
 For 2016/2017 the average day fees at a UK HMC school are £4,639 per term or £13,917 per annum.
 For 2016/2017 the average full boarding fees at a UK HMC school are £10,709 per term or £32,127 per annum.
Madison Country Day School is a nonsectarian, private day school in Dane County, Wisconsin for grades PreK through 12.
 The school has an enrollment of about 400 students.
 It is accredited by the Independent Schools Association of the Central States (ISACS), and is a member of the National Association of Independent Schools (NAIS).
 It is an International Baccalaureate (IB) World School that offers the IB Diploma Program to high school students.
 Madison Country Day School is informally known as "MCDS", and "Country Day".

Question: In which country can you find the Jerudong International School, a co-educational, boarding and day school which is affiliated to several British school organisations including the association of the headmasters or headmistresses of 283 independent schools?
Answer: Brunei