What about shapes, patterns, and spatial reasoning?
Geometry, measurement, and pattern recognition are real and important parts of early math, and research treats them as a related but separate skill set from number sense itself. They show up throughout this site's activities and guides, but they follow their own developmental path rather than being a fourth strand of the three skills above.
What actually helps
Math is already in your day, before any flashcard
Researchers consistently find that everyday, embedded math talk builds number sense more reliably than dedicated math time with worksheets or apps.
Worksheet drills
Isolated number practice
Repetition without context builds memorization, not number sense.
Correcting fingers
Discouraging finger counting
Pushing a child away from fingers too early can remove a scaffold they still need.
Everyday math talk
Counting, comparing, and sharing out loud
Snack time, stairs, and toy cleanup are where most early number sense is actually built.
Rushing to operations
Jumping straight to addition
Skipping ahead before counting and comparison are solid makes operations feel like memorization instead of sense.
Count anything, out loud
Stairs, snacks, toys. The object does not matter, the repetition does.
Ask "how many" and wait
Let your child actually count rather than answering for them.
Use comparison words often
"You have more grapes than me" builds number relations naturally, in passing.
Let fingers do the work
Encourage finger counting for addition and subtraction. It is a strategy, not a shortcut to discourage.
Narrate splitting and combining
"Three cookies, if I give you one, I have two left" builds operations before any worksheet does.
Number sense in infancy predicts standardized math scores three years later, before a single lesson is taught.
Preverbal number sense at six months old has been shown to predict measured math ability at age three and beyond.