1. What is the difference between dyscalculia and dyslexia when it comes to maths as both SpDs can result in maths difficulties? How do you discriminate between the two?
Dyslexia is about language, as in reading, writing and spelling. Dyscalculia is about maths, particularly arithmetic. They can occur together in an individual (comorbidity). Both language and maths use symbols, both rely on working memory and (specific) long term memories and on speed of processing. For these reasons alone the two specific learning difficulties might be present in the same individual. They differ in the subject matter they affect.
2. Can you have both dyslexia and dyscalculia?
Yes. However, the outcomes, in terms of dealing with them, may be different.
3. Is there a special way of teaching dyscalculics?
Yes, but it is important to note that those ways may often help many other children too. I am a great believer in learning from the 'outliers'. Certainly, avoid the 'more of the same, but slower (and definitely NOT louder)' approach. At any age!