Mathematics
Percent Change: Discounts, Tax, Tips and Growth
Students calculate percent increase and decrease in sales, tax, tips and population problems and correct three sample student solutions.
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Science
Potato Cores and Salt Water: Analyzing Osmosis Data
Students analyze made-up class data from potato cores soaked in salt solutions, calculate percent change in mass and write a data-based conclusion about osmosis.
Science
Runoff, Algae and Fish: Reading a Lake Data Set
Students analyze a made-up five-year lake data set to link nutrient runoff to algae growth, low oxygen and fewer fish, then propose a follow-up investigation and a solution.
Science
Solutions and the pH Scale: Molarity, Dilution and Reading pH
Students calculate molarity and dilution amounts on paper, then read an everyday pH table to classify acids and bases and compare acidity.
Mathematics
Systems of Equations: Substitution and Elimination
Students solve systems of two equations by substitution and by elimination, check solutions, and use systems to solve two word problems.
Mathematics
The Quadratic Formula and the Discriminant: Solve and Predict
Students use the discriminant to predict how many real solutions each quadratic has, solve six equations with the quadratic formula, and model a falling object.
Mathematics
Two-Step Inequalities: Solve, Test and Describe
Students solve two-step inequalities, match them to word descriptions, model budget situations and correct sample student work.