My daughter had extra time for PSLE and O lvl. You need a letter from a certified EP or OT. I don't think SEAB accepts parents nor doctor's (GPs) letters. The letter must state the condition / issues (be it ASD, APD, Dyslexia, ADHD....) that your child has. It would support your cause if there's accompanying documents that certify that your child has been diagnosed with the said condition/ issue.
Because these letters have a validity period (SEAB has this 2-3 years validity period before national exam. Very troublesome), I feel that the best time to request for extra time is end of P5 or Sec 3 (maybe after SA2?), then, you know that the letter is definitely valid and in time for PSLE, O lvl. Not sure about for A lvl, hopefully the O lvl letter can be extended to the A lvl exam.
FT usually request for these documents in Jan, so make sure that you have everything ready by then. You don't want to go thru the stress of a mad scramble to get the paperwork done in Jan.
In that important letter where you request for extra time, make sure you discuss with your child, therapists (or whichever professional your child is seeing), teachers, tutors to see what else is needed to include in the content.
For example, in my daughter's case, we requested for:
- extra time
- permission to use erasable pen or pencil (we needed a writing tool that allowed her to erase wrong answers as we did not want to use the correction tape/fluid and cancellation method.)
- sit for exam in a separate room (and not in the main hall tog with the other neuro-typical students)
You can also request for the exam questions to be enlarged (for vision impaired students, for eg., some exam papers are printed on A3 sized papers or font is 20 point size). There are also cases where the exam questions are read out to the child. A lot of it is case-by-case (every child is unique), so there is no one standard letter that fits all.
Another thing you might want to think about is that there is an annotation in the results cert/slip. Some parents see that as a blemish to the child's records. I've thought hard about this but at the end of the day, my child needed the extra time to help her. And that really made a positive difference.
Again, I must reiterate that this letter to SEAB should include whatever reasonable requests you want for your child. This is because, for some of these EPs and OTs, they will charge to prepare the letter for you. So, every time you make a new request, it's additional charges since the EP/OT has to prepare a new letter. I learnt that the hard way when she sat for her PSLE.
That's why I mentioned earlier that it is important to talk to the relevant people to help you make a more informed decision. Based on what is needed, parents will be in a better position to inform the EP or OT, who is preparing the letter what to request in the content.
HTH