My 10 y/o niece just got diagnosed with a math disorder. Her WISC PRI is 115 (84%) but several of her WJ math subtests are far below that: Applied Concepts 36%, Math Fluency 19% and Quantitative Concepts 24%. My sister-in-law needs some tutoring resources to help remediate my niece's basic math skills and understanding. They live in Russia.

Can anyone suggest resources for a math disability that she can order and take? Or online resources?

Thanks for any help or guidance!