MathUSee
"MathUSee is designed to teach students specific skills that build as the student progresses. This systematic and cumulative approach uses a definite, logical sequence of concept instruction. The MathUSee system is structured with stepbystep procedures for introducing, reviewing, practicing, and mastering concepts. Each lesson teaches using multisensory tools such as videos, manipulatives, and other resources, designed to appeal to any type of learner."
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Common signs of dyscalculia include trouble:

Grasping the meaning of quantities or concepts like biggest vs. smallest

Understanding that the numeral 5 is the same as the word five, and that these both mean five items

Remembering math facts in school, like times tables

Counting money or making change

Estimating time

Judging speed or distance

Understanding the logic behind math

Holding numbers in their head while solving problems
Understood.org
If your child struggles in math, it may be because of DYSCALCULIA
Dyscalculia, is a math learning disability that impairs an individual’s ability to represent and process numerical magnitude in a typical way. Dyscalculia is sometimes called “number dyslexia” or “math dyslexia.” Common symptoms of dyscalculia include difficulty with number sense, fact and calculation, and mathematical reasoning. This may present as difficulty linking numbers and symbols to amounts and directions, making sense of money, or telling time on an analog clock. Roughly 5%7% of students in the United States have this mathbased learning disability.