Number Line Jumper
A number line puts values in order at equal intervals: direction shows increase or decrease, while the scale tells what each hop is worth across whole numbers, negatives, fractions, and decimals.
What your child will figure out
- Locate labelled values and explain a landing by naming the start, direction, interval value, and number of equal hops.
- Predict and enact addition as rightward jumps and subtraction as leftward jumps from positive or negative starting values.
- Read interval sizes other than one and use them for skip-counting, wide ranges, and movement through zero in either direction.
- Use half, quarter, tenth, and mixed-size intervals, then practise adaptively across varied real-world contexts.
The levels
- Find the fourth lily pad
Predict and locate 4, observe the ordered labels, and explain that values increase to the right.
- Leap to the firefly
Predict 2 + 4, enact four rightward jumps, observe the arc, and explain why the landing is 6.
- Back to the blue bloom
Predict 8 − 5, enact five leftward jumps, and explain subtraction as movement toward smaller values.
- Stepping-stone doubles
Read two-unit intervals and connect three hops with a total change of six.
- Lanterns by tens
Use a 0–100 scale marked in tens to connect interval count with a larger total change.
- Find the frosty marker
Locate −4 and explain the order of negative values to the left of zero.
- Moonlit minus marsh
Transfer the jump model across zero to solve 2 − 5 = −3 without treating zero as a wall.
- Climb from the cold
Add from a negative starting value and cross zero moving right.
- Dive below the reeds
Subtract from a negative starting value and compare negative positions by their order.
- Half-pad hop
Interpret half-unit intervals and add 1½ as three equal half-hops.
- Halfway through zero
Subtract with half-unit intervals while crossing zero into a negative fraction.
- Quarter-pad crossing
Add seven quarter-hops from a negative fractional start.
- Dragonfly decimal dash
Read tenth-unit intervals and connect six hops with a change of 0.6.
- Storm-to-sunrise finale
Transfer direction, signed values, and a five-unit scale to a wide-range temperature change.
Ready when they are.
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