"He would be the smartest lad in the school if the instruction were entirely oral..." (first case of dyslexia, Pringle Morgan- 1896)
The first link below is a scholarly resource reviewing and trying to solve the academic dilemmas of gifted dyslexic engineers. The cases show many common but extremely frustrating conditions - reversals, omissions of words, inversions of fractions - all present in the face of high level analytical and problem solving ability. In some cases, seemingly trivial interventions like performing calculations on custom-sized graph paper solved 'careless' errors. Extra time was also a great help.
We also include a dyslexic architect's reflection on her educational strengths and challenges. You can see that paradoxes abound. She had difficulty with conventional 2-D geometry (mirror reflections), but she excelled in 3D work.
Free Online Graph Paper / Grid Paper PDFs