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In this concept attainment lesson, students try to determine the difference between a simple sentence and a compound sentence.

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In this concept attainment lesson, students try to determine the difference between a run-on sentence and a correct sentence.

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In this concept attainment lesson, students try to determine the difference between compound and complex sentences

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Students will grapple with The Barber's Paradox about a barber who may (or may not) shave himself.

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This series exposes students to sets of five related idioms, perfect for vocabulary enrichment.

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In this concept attainment lesson, students try to determine the difference between progressive and simple tenses.

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In this concept attainment lesson, students try to determine the difference between past progressive and simple past tenses.

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Using this slideshow, students attempt to determine the parts of speech of several uses of the word "well" and its derivations.

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Using this slideshow, students attempt to determine the parts of speech of several uses of the word "limit" and its derivations.

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Using this slideshow, students attempt to determine the parts of speech of several uses of the word "limit" and its derivations.

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Students uncover patterns with exponents and then make predictions about the powers of 0 and 1.

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In this video, students will look at themselves using the prompts of complexity, choosing either multiple perspectives or change over time, plus three prompts of depth.

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Using calculators, students will gain familiarity with the patterns that occur when multiplying by decimals. They'll note these patterns and use them to make predictions before checking with their calculator.

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In this video, students introduce themselves using four of the elements of Depth and the Frame graphic organizer.

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In this video, students will investigate how to round to numbers other than multiples of ten. What if we want to round to the nearest 9, 12, 52, or 75?

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Students will grapple with the crocodile dilemma, a paradox from Ancient Greece.

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Students puzzle through three variations on The Liar's Paradox.

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In this math curiosity, students investigate this fascinating pattern: every positive integer can be written as the sum of four (or fewer) perfect squares.

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In this math curiosity, students fill in a square using a set of integers so that each row, column, and diagonal have the same sum.

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Students will investigate the curious question: How few colors do you need to color in *any* map?