Hi Hermitcrab:
I'd say 3 things for you to pass on to your daughter
First: Roughtly 10% of UK population has some degree of dyslexia. Letters dancing on the page, difficulty with order of long sequences of letters/ numbers and often some difficulties with organisation and no short-term memory are classic indicators.
Dyslexia just means your daughter is wired differently. It may mean only using coloured filters but it could also mean some training with word or number patterns. Once strategies are developed, most dyslexics are very successful and 'keeping up' with their peers.
Second: Dyslexia has its blessings. It may not be obvious just yet - but there will be compensations. Many dyslexics have excellent recall - with some even having a photographic memory. These are skills us 'normals' would absolutely kill for - I say this because my severely dyslexic husband can remember where exactly he saw that picture in a book and has an incredible memory for visual details. I also know of dyslexics who have an incredible memory for music or for stories/ poems. They can hear something a few times and simly memorize it.
Third: Every time you hear someone famous is dyslexic do make sure to point that out to your DD. It really helps to have role models. You can learn more here: www.bdadyslexia.org.uk/about-dyslexia/famous-dyslexics.html. You'd be amazed how many incredibly successful/ famous people are/ were dyslexic. My personal favourite is Albert Einstein - and let's be honest it didn't hold him back much.
Dyslexia is a disability - but that doesn't mean to say that a dyslexic can't go on to be successful (in some cases incredibly successful).
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There are some down sides. Your daughter will work approximately 20% - 30% harder than 'normal' children to get through an ordinary school day. This means that breaks and rest are crucial. It may seem counterintuitive to do very little in the evening or have a long rest after school and start homework maybe after dinner - but think of it as her working 7.2 - 7.5 hrs (so 9 - 5 p.m.) at school instead of 9 - 3:30.
Frequently dyslexics also have issues with eye hand coordination. This can be very frustrating for sports and often means dyslexics have poor handwriting. This may also be a problem when it comes time to learn to drive.
Dyslexics often find it more difficult to follow conversations/ oral instructions - often not getting the joke or inuendo. Another classic is that they will get told something in passing and almost immediately forget it.
It is likely that your daughter will need more time to complete written work. This is important for exams and is something the school and perhaps later the Univeristy should make provision for. In senior school/ sixth form/ university - dyslexic pupils can be allowed to submit work prepared on a computer - so this is worth looking into down the road, especially if handwriting is an issue.
There will always be things that dyslexics won't pick up when proof-reading their own work. For instance homonyms - such as wear and where or their, there and they're are frequently used interchangeably by dyslexics who understand the sound by can't always work out/ retain the differences in meaning, especially when under pressure (as in an exam situation).
Finally dyslexia is hereditary and if in a girl, it means both the mother and father carried the genes. So I suspect if you think back (it can skip a generation) you probably are aware of family members who didn't read particularly well or had unusual ways of working out sums.