Glow Math & Logic · Lesson 01
Test a conjunction step by step
Make explicit the second test required after a color match. Explore a model, explain the relationship, and try it with physical materials.
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Grade 3 Sorting Studio lessons
Ten Grade 3 lesson drafts for exploring sorting studio through models, conversation, and hands-on practice. Try three complete free sample lessons. A paid adult account opens all teaching guides, printable PDFs, and learning tools.
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Glow Math & Logic · Lesson 02
Order the tests another way
Show that reversing test order preserves the classification. Explore a model, explain the relationship, and try it with physical materials.
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PDF · Paid classroomGlow Math & Logic · Lesson 03
State a sufficient description
Give a description that uniquely identifies the overlap tile. Explore a model, explain the relationship, and try it with physical materials.
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Negate both conditions
Distinguish neither condition from not both conditions. Explore a model, explain the relationship, and try it with physical materials.
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Prove all nine placements
Construct an exhaustive argument covering every available tile. Explore a model, explain the relationship, and try it with physical materials.
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Count overlapping sets carefully
Explain why adding complete set counts double-counts the overlap. Explore a model, explain the relationship, and try it with physical materials.
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Invariants when a rule changes
Identify changed memberships and unchanged region counts. Explore a model, explain the relationship, and try it with physical materials.
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An apparently plausible mistake
Analyze how a true attribute can support an incorrect region choice. Explore a model, explain the relationship, and try it with physical materials.
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Two-way tables as a proof tool
Use paired decisions to organize a complete classification argument. Explore a model, explain the relationship, and try it with physical materials.
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Universal claims and counterexamples
Construct and test a universal statement using the finite tile set. Explore a model, explain the relationship, and try it with physical materials.
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