Choose a pathway to begin. Your progress and final score will be saved when you finish.
Pathway collection
Solve multi-step real-life and mathematical problems with rational numbers and assess reasonableness.
Start pathway →Rewrite expressions in different forms to reveal useful information about a problem.
Start pathway →Use variables to represent quantities and solve equations and inequalities from real situations.
Start pathway →Use properties of operations to add, subtract, factor, and expand linear expressions.
Start pathway →Pathway collection
Multiply and divide positive and negative rational numbers and interpret quotients.
Start pathway →Solve real-world and mathematical problems involving all four operations with rational numbers.
Start pathway →Add and subtract positive and negative rational numbers using models and properties.
Start pathway →Pathway collection
Decide whether two quantities change by the same multiplier.
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Use multiplication and division to preserve the same comparison.
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Find how much for exactly one unit.
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Use rows and columns to find a constant multiplier.
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Find and interpret the multiplier k.
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Represent proportional relationships with algebra.
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See constant rates as straight lines through the origin.
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Connect a graph’s steepness to its constant of proportionality.
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Recognize one proportional relationship in different forms.
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Use equivalent ratios, unit rates, and equations strategically.
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Connect fractions, decimals, and percentages to “per 100.”
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Use proportional relationships to connect models and real objects.
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Use unit rates to make fair decisions.
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Identify starting values, changing rates, and misleading patterns.
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Select, solve, and explain proportional models in complex situations.
Start pathway →Pathway collection
How characteristics pass from parents to offspring—and why genes are only part of the story.
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How sections of DNA and their different versions contribute to inherited variation.
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How allele interactions affect phenotype—and what “dominant” does not mean.
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Reading and interpreting an organism’s allele combination.
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How genes, development, and environment contribute to observable characteristics.
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Classifying allele pairs and connecting them to inheritance predictions.
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Predicting the chance of inheritance outcomes without treating chance as a guarantee.
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How controlled crosses and careful counting revealed basic inheritance patterns.
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Using one gene at a time to predict possible offspring genotypes and phenotypes.
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Tracking two genes while checking whether independent assortment is a reasonable model.
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Using family diagrams to trace inheritance patterns while respecting uncertainty and privacy.
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How DNA differences arise and contribute to diversity, health, and evolution.
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Two inheritance patterns that go beyond a simple dominant–recessive model.
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How genes on sex chromosomes can create distinctive inheritance patterns.
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How heritable variation and differential reproduction change populations over generations.
Start pathway →Build your understanding with interactive lessons, step-by-step examples, and practice you can complete at your own pace.
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