Rocket 123s

Number recognition and form constancy for ages 3–7. Hierarchical exercises from a Northwestern Ph.D. with 40 years of clinical practice with children.

A clinical-grade learning app that helps children ages 3–7 recognize, sort, and develop foundational understanding of numbers — designed by Dr. Donalee Markus, a Northwestern-trained neuroscientist with 40 years of practice working with children.

WHAT IT TEACHES

• Number recognition (1–10 and beyond)

• Form constancy — recognizing the same number across fonts and styles

• Number sorting and basic sequencing

• Foundations of mathematical reasoning

• Visual processing of numerical symbols

WHO IT'S FOR

• Children ages 3–7

• Pre-K and kindergarten learners

• Children with learning differences who benefit from explicit practice

• Children with delayed math readiness

• Used by parents, teachers, and clinicians

WHAT MAKES IT DIFFERENT

Rocket 123s is built on the same three-pillar neurocognitive model that Dr. Markus uses with adult patients — Attention, Intention, Rehearsal. The exercises are hierarchical and progressive, designed to build genuine skill rather than just keep a child engaged.

ABOUT THE DEVELOPER

Dr. Donalee Markus has practiced cognitive restructuring since 1983, including extensive work with children. She earned her Ph.D. at Northwestern University and completed post-doctoral training under Reuven Feuerstein.