Middle & high school · Starter lessons
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Mathematics
Use direction and distance to explain integer addition and subtraction.
▷ 2 video choices · Practice & answers
Open lesson →: Signed Numbers on a Number LineMathematics
Use equivalent ratios and unit rates to compare quantities with units.
▷ 2 video choices · Practice & answers
Open lesson →: Ratios and Unit RatesMathematics
Use inverse operations on both sides to solve a one-variable equation.
▷ 2 video choices · Practice & answers
Open lesson →: Solve and Check an EquationEnglish language arts
State a central idea and explain how specific details support it.
▷ 2 video choices · Practice & answers
Open lesson →: Central Idea and Supporting EvidenceEnglish language arts
Connect a clear claim to relevant evidence with explicit reasoning.
▷ 2 video choices · Practice & answers
Open lesson →: Build an Evidence-Based ParagraphEnglish language arts
Improve a paragraph by clarifying references, choosing precise language and removing repetition.
▷ 2 video choices · Practice & answers
Open lesson →: Revise Sentences for ClarityScience
Identify a question, variables and measurements for a controlled comparison.
▷ 2 video choices · Practice & answers
Open lesson →: Plan a Fair InvestigationScience
Use particle models and evidence to distinguish types of material change.
▷ 2 video choices · Practice & answers
Open lesson →: Particles, Physical Changes and Chemical ChangesScience
Use arrows to explain energy transfer and predict possible effects in a food web.
▷ 2 video choices · Practice & answers
Open lesson →: Trace Energy in a Food WebSocial studies
Distinguish source types and evaluate what a source can and cannot show.
▷ 2 video choices · Practice & answers
Open lesson →: Ask Questions of Historical SourcesSocial studies
Explain how location and resources can influence settlement without assuming they determine every outcome.
▷ 2 video choices · Practice & answers
Open lesson →: Geography, Resources and SettlementSocial studies
Compare civic proposals using goals, evidence, costs and affected groups.
▷ 2 video choices · Practice & answers
Open lesson →: Compare Solutions to a Community Problem