resources: LD Math (dyscalculia)
websites:

Math Is Fun
Worksheets, math dictionary, etc., for all ages and math levels.

Math Goodies
Interactive lessons, homework help and worksheets

Doodle Math
Personalized, standards-aligned online math practice designed by teachers for kindergarten through 5th grade.

IXL Personalized Learning
Personalized learning for math, science and English

PhotoMath
Step-by-step explanations on how to solve math problems

Khan Academy
Offers in-depth explanations with videos for all types of math from pre-K to college

AAA Math
Unlimited practice translated into various different languages

Dreambox
Provides fun and personalized instruction for math K-8 and reading K-12

Brilliant
“Interactive lessons make even complex ideas easy to grasp. Instant, custom feedback accelerates your understanding.” For kids 13+ with lessons about algebra, functions and programming.
articles:

What is dyscalculia?
This article provides a general description of dyscalculia along with key resources and strategies for learning
books for kids:

The Number Devil: A Mathematical Adventure By Hans Magnus Enzensberger (Ages 9-12)
A fun story that makes math engaging through a dreamlike adventure, ideal for kids struggling with numbers.

Math Curse By Jon Scieszka (Ages 6-10)
A humorous take on a girl overwhelmed by math, helping kids relate to math challenges.
books for parents:

The Dyscalculia Toolkit
By Ronit Bird

Why Is Math So Hard For Some Children?: The Nature and Origins of Mathematical Learning Difficulties and Disabilities
By Daniel Berch Ph.D and Michele Mazzocco Ph.D
videos:

Math Story
Math music videos, poems, songs, and stories
Learning Games for kids:

Arcademics
Free math games for grades 1 to 6 covering all aspects of elementary math subjects.

Coolmath4kids
Math games, lessons, quizzes, manipulatives and brain teasers to help kids understand math.

CoolMath.com
Free online math lessons with games for algebra, pre-algebra and calculus.

Mathies
Math apps, games and online learning tools.

Math Playground
A large variety of K-6 math games, stories and logic-based challenges.

Prodigy
“With Prodigy, kids practice standards-aligned skills in Math and English as they play our fun, adaptive learning games. All with teacher and parent tools to support their learning in class and at home.”