Grade 7 math, as an adventure

38 7th grade topics in six worlds: The Namib Desert, Iceland, Sumatra, Kamchatka, Fiji and Kruger National Park. In each world, characters guarding eggs ask story problems. Solve them to claim the egg, warm it and hatch a hybrid animal.

The six worlds of Grade 7

• World 1: The Namib Desert

  Proportions & Percent

  Unit rates with fractions, proportional relationships, the constant of proportionality, and percent problems: discounts, tax, tips, interest and percent error.

  See topics and a sample problem

• World 2: Iceland

  Rational Numbers

  Adding, subtracting, multiplying and dividing positive and negative numbers, fractions as decimals, and rational number word problems.

  See topics and a sample problem

• World 3: Sumatra

  Expressions & Equations

  Combining like terms, expanding and factoring, multi-step problems, two-step equations and inequalities.

  See topics and a sample problem

• World 4: Kamchatka

  Scale, Angles & Solids

  Scale drawings, triangles, cross sections, circles, angle relationships, and area, surface area and volume.

  See topics and a sample problem

• World 5: Fiji

  Sampling & Comparing Data

  Random samples, making predictions from a sample, and comparing two groups with centers and spreads.

  See topics and a sample problem

• World 6: Kruger National Park

  Probability

  Likelihood, experimental and theoretical probability, probability models, compound events and simulations.

  See topics and a sample problem

How a problem works

Problems are read, not raced: there is no timer and no lives to lose. A first wrong answer gets a tip that uses that problem’s own numbers. A second shows the problem worked out step by step. Every wrong answer we plan for is tied to a named mistake, so the grown-ups’ dashboard can show where to help and why.

Other grades: Grade 1 · Grade 2 · Grade 3 · Grade 4 · Grade 5 · Grade 6