Place Value Lab
Connect a spoken or written number to a quantity built from objects and groups.
Place Value Lab: Model one relationship100 category-specific investigations are open for Grades 6-8 review across all 100 Worlds.
Connect a spoken or written number to a quantity built from objects and groups.
Place Value Lab: Model one relationshipMake equal shares and explain how the whole is divided without introducing symbolic procedures too early.
Fraction Forge: Model one relationshipRepresent an unknown quantity with a concrete box and preserve equality through matching moves.
Algebra Lab: Model one relationshipTreat an equation as a statement that two quantities are the same.
Equation Solver: Model one relationshipBuild fair one-to-one relationships before using formal ratios.
Proportion Lab: Model one relationshipConnect a changing situation with a picture graph that rises, falls, or stays level.
Graphverse: Model one relationshipUse visible shape properties to justify why a claim remains true after moving or turning a shape.
Geo Proof: Model one relationshipBuild a short explanation by connecting a claim to observable evidence.
Proof Builder: Model one relationshipRepresent a story situation with objects, actions, and an equation appropriate to the grade.
Word Problem Engine: Model one relationshipCompare measurable lengths by aligning objects to the same starting point.
Measure Lab: Model one relationshipUse equal groups to describe repeated quantities before symbolic multiplication.
Multiply Forge: Model one relationshipShare a collection into equal groups and check for leftovers.
Division Lab: Model one relationshipCompose a whole from equal parts and connect tenths to familiar measurement contexts in Grade 2.
Decimal Bridge: Model one relationshipIdentify, extend, and describe repeating and growing visual patterns.
Pattern Lab: Model one relationshipCompose larger shapes from smaller shapes and decompose them in multiple ways.
Shape Builder: Model one relationshipDescribe position and movement using directional language and an ordered grid path.
Coordinate Grid: Model one relationshipCompare turns and corners using square-corner and quarter-turn benchmarks.
Angle Lab: Model one relationshipCompare how containers cover space and how faces can be composed from shapes.
Surface & Volume Lab: Model one relationshipDescribe chance using possible, impossible, and more or less likely outcomes.
Probability Lab: Model one relationshipNotice constant additive change in a concrete growing pattern.
Linear Lab: Model one relationshipCompose and compare square regions without introducing a formal theorem prematurely.
Pythagoras Lab: Model one relationshipRecognize repeated doubling as a growing pattern without symbolic exponent notation.
Exponent Lab: Model one relationshipDescribe a consistent input-output rule using a concrete machine.
Function Intro: Model one relationshipOrder familiar events and connect clocks and coins with their everyday purposes.
Time Money Units: Model one relationshipCompare repeated one-for-each relationships in familiar contexts.
Ratio Rate: Model one relationshipConnect different action stories that produce the same quantity.
Expression Lab: Model one relationshipCompare two quantities using more, fewer, and the same before introducing symbols.
Inequality Lab: Model one relationship