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Online Dyscalculia Tutor: Sue du Plessis

What is dyscalculia?

Dyscalculia refers to a wide range of persistent and extreme difficulties in math, including weaknesses in understanding the meaning of numbers and difficulty applying mathematical principles to solve problems.

Dyscalculia differs from the ordinary experience of “being bad at math.” For example, many students may find trigonometry difficult. Children with dyscalculia, however, may be unable to solve simple problems such as 7+2 or 5×3.

Research suggests that dyscalculia has the exact prevalence of dyslexia (about 6–8% of children), although it is far less widely recognized by parents and educators (Shalev, 2007Ardila & Rosselli, 2002).

As with dyslexia, early intervention is essential to minimize the impact dyscalculia can have on a child.

Meet Sue, online dyscalculia tutor

Sue du Plessis, Dyscalculia Tutor

After training and working as a psychometrist (someone who administers and scores neuropsychological, psychological, personality, and academic tests), Sue became employed by a learning institution. During this time, Sue was instrumental in training over 3,000 teachers and tutors, providing them with the foundational and practical understanding to facilitate cognitive development among children who struggle with learning. 

Sue next conceptualized the Edublox teaching and learning methods that have helped thousands of children struggling academically to learn and achieve. In 2007, she opened the first Edublox reading, math, and learning clinic, where children could grow intellectually, overcome their learning challenges, and succeed academically. There are now 30 Edublox clinics internationally. 

Sue extended Edublox’s services to online tutoring in February 2017 when she was approached by a parent whose severely dyslexic and dyscalculic daughter had made little progress despite three years of intensive tutoring. This student made exceptional progress with regard to math: Dyscalculia Success Story: From “Extremely Low” to “Average” in Math. Many other students have since benefited from her online tutoring.

When not teaching, Sue contributes to the Edublox website with articles on learning and learning disabilities.

Dyscalculia articles by Sue

What clients say

This has been monumental in her confidence and growth in the area of math. She has gone from consistently failing and constant discouragement to straight A’s and feeling proud of herself. I appreciate your investment in her over this last year. It has changed the trajectory of her education. – April

Our tutor is extremely professional and personable. She relates in a gentle and insightful manner with my child in a way no one has been able to before. My child had extreme math anxiety and now often leaves a session stating “I love math!” She was able to make gains in a few months that multiple tutors and myself had worked on for years without any positive movement. The incremental approach has snowballed into a lovely movement of learning! More than pleased. – Robyn

Sue has a great talent for assessing how Veronica is on a particular day and how to get the best from her. She is flexible to change the session accordingly. – Dennis

Thank you for always taking such good care of us and treating us so well. We definitely recommend Edublox to anyone who would like to give their child(ren) a better chance scholastically. – Lee-Anne and Byran

Client playlist


Edublox offers cognitive training and live online tutoring to students with dyscalculia and other learning disabilities. Our students are in the United States, Canada, Australia, and elsewhere. Book a free consultation to discuss your child’s learning needs.