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Activity
University of Cambridge

University of Cambridge: Nrich: 1, 2, 3 Magic Square

For Students Pre-K - 1st Standards
Sharpen your logic and basic addition facts skills while working on this challenge. Solution.
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Whiteboard
ClassFlow

Class Flow: Antonyms

For Teachers 3rd - 9th Standards
[Free Registration/Login Required] This flipchart utilizes a magic window to reveal the appropriate answers for finding antonym matches. It also has a matching game to uncover words that are antonym pairs. This is a great review for...
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Handout
Other

Wichita State University: Takakazu Seki Kowa (1642 1708)

For Students 9th - 10th
This site provides a general biography of Takakazu Seki Kowa, "the arithmetical sage." Content focuses on his known accomplishments. Also includes related links.
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Activity
University of Victoria (Canada)

Amof: Amazing Mathematical Object Factory

For Students 9th - 10th
The Amazing Mathematical Object Factory allows you to review many combinatorial objects by producing lists of mathematical objects. This game helps make discrete mathematics more accessible. Combinatorial objects are studied in discrete...
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Handout
University of St. Andrews (UK)

University of St. Andrews: Takakazu Seki Kowa

For Students 9th - 10th
The University of St. Andrews offers this biography of Takakazu Seki Kowa. Many interesting links are provided.
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Website
Cut the Knot

Cut the Knot!: Interactive Mathematics: Geometry Articles, Theorems, Problems

For Students 9th - 10th
Contains over five hundred Geometry articles, problems, puzzles, and games. Some sites relating to circles are provided within this list.
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Whiteboard
ClassFlow

Class Flow: Magic Math Squares

For Teachers 1st - 4th Standards
[Free Registration/Login Required] Students complete number sentences by inserting numbers in the correct order to arrive at a predetermined answer.
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eBook
Library of Congress

Library of Congress: Classic Books

For Students Pre-K - 1st
Read these beloved classic stories with their original illustrations. 23 books for children, including The Three Little Pigs and Denslow's Humpty Dumpty. 6 novels for teens, including Poe's The Raven and Dickens' A Christmas Carol. All...
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eBook
Library of Congress

Library of Congress: Classic Books

For Students Pre-K - 1st
Read these beloved classic stories with their original illustrations. 23 books for children, including The Three Little Pigs and Denslow's Humpty Dumpty. 6 novels for teens, including Poe's The Raven and Dickens' A Christmas Carol. All...
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Lesson Plan
Alabama Learning Exchange

Alex: Imaginary Numbers? What Do You Mean Imaginary?

For Teachers 9th - 10th
Is it any wonder that students are suspicious? We lead, sometimes drag, them through Algebra I insisting they must follow the order of operations. We make them learn the "hard way" of doing an assignment one day only to show them the...
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Graphic
Curated OER

Eternal Egypt: Headrest of Mesehti

For Students 9th - 10th
The headrest of Mesehti is carefully modeled. It has a curved top with a square abacus, or slab, above a short shaft and a base. Open hands were drawn in brown as a reference to the magical function of the headrest.

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