Dear madam/Sir,
I would hereby like to ask you to exempt me from taking English as a subject of my studies SPW3 kinderopvang.
My motivation for asking you to do so is as follows:
Ever since passing my English test as part of my MAVO-D exams (comparable with O-levels) with both a 9 for the written exam and a 9.5 for the oral exam, I have practised the English language on a daily basis.
I have lived and worked in a former English colony (Malta), where the first language is in fact English, for several years and was married to a woman native to that country as well.
I shall enclose copies of my marriage-certificate, freedom of movement grant (equal to a staying permit) and a letter of reference from one of my former employers in Malta.
After returning to Holland, I have stayed in contact with several people I have met in my time in Malta, and met other people in England that I’m still in contact with to this day, mostly by phone or e-mail and at least once a year in person.
I will also enclose a letter of reference from a journalist that writes for two of England’s best selling motoring magazines, that I have known for several years now and I’m in regular contact with.
Due to the reasons stated above I feel I have a reasonable command of the English language, both written and verbal, and I would very much like to ask you to grant me this request, so that I may concentrate my energies and efforts on the other subjects associated with my studies, as well as my apprenticeship.
Only changed a couple of bits, but you write better English than some English regulars on here

I'd even be tempted to send it as you wrote it, it's that good (for a non-English guy).
Good luck with your studies mate