Algebra Nexus

Frost covers a number line that runs below zero. You choose a side of zero, then whether farther left means smaller.

Grades 6 · integers

Positive and negative chips must show a target value. You choose a charge, then whether opposites cancel.

Grades 6, 7 · integer-ops

The loom evaluates an expression when a variable is replaced. You choose a thread, then substitute before you calculate.

Grades 6 · expressions

Gates open only if the expression's structure is respected. You choose a pattern, then whether multiplication outranks a casual left-to-right reading.

Grades 5, 6 · order-ops

A lock is a one-step equation on a balance. You choose to undo addition or multiplication, and you do the same to both sides.

Grades 6 · equations

The reactor is a two-step equation. You undo addition before division, or the core stays unbalanced.

Grades 7 · two-step-equations

A current stays safe for many values, not one. You find the boundary and the direction.

Grades 7 · inequalities

A grid of lights from every world is an ordered pair, then a linear rule. You plot the point, then decide whether the rule holds for every row.

Grades 6, 7, 8 · coordinates

Conduits repeat a factor. You choose a base, then whether an exponent means repeated multiplication.

Grades 6, 8 · exponents

Beacons write a number as a coefficient from 1 up to 10 times a power of ten. You choose a beacon, then keep the value the same.

Grades 8 · scientific-notation

A chance engine spins equal outcomes. You choose a spinner, then write favorable over all outcomes.

Grades 7 · probability

Signals from the nine worlds arrive as a short list. You choose a list, then find the median rather than the mean.

Grades 6 · data