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The Dred Scott Act
The Dred Scott case (Scott v. Sandford) occurred during a time of high tension over slavery. Learn about the Court's decision and its effects here!
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Zone of Proximal Development (ZPD)
Vygotsky's Zone of Proximal Development (ZPD) is when a student can complete the activity with some assistance from a more knowledgeable other.
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Calorimeters
A calorimeter is an experimental tool chemists use to measure the heat released or absorbed by a chemical or physical change. Click here to understand more!
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Effective Nuclear Charge
The effective nuclear charge of an atom is the net positive charge experienced by its outermost electrons (valence electrons).
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Pure Substances and Mixtures
Pure substances can be elements (oxygen, uranium) or compounds (carbon dioxide, calcite). Mixtures can either be homogeneous or heterogeneous.
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Finding Tangent
Tangent is the ratio relative to an angle of the opposite side over the adjacent side. earn about tangent's uses in geometry and calculus with examples here!
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Importance of Promoting Literacy in the Home
You can promote literacy through wordplay, games, and reading books. Click here to learn why these activities are important!
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Proof that a Triangle is 180 Degrees
Learn why the angles of a triangle add to 180 degrees using parallel lines, straight angles, alternate interior angles, and examples.
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Summarizing Text
Summarizing text is useful to recall long texts and organize a passage's main ideas. Learn how to write a summary for memorization and note-taking here!
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Rocks vs. Minerals
Rocks are made up of different materials including some minerals, but the mineral levels depend on the individual rock. Learn about rocks and minerals here!