# Math Gems

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Calculus Online Book Math Expression: Free Math Tutor Online Angles - Acute, Obtuse, Straight and Right An angle measures the amount of turn Names of Angles As the Angle Increases, the Name Changes: Try It Yourself: Also: the letter "A" has an acute angle. Be Careful What You Measure Positive and Negative Angles When measuring from a line: a positive angle goes counterclockwise (opposite direction that clocks go) a negative angle goes clockwise Example: −67° Parts of an Angle The corner point of an angle is called the vertex And the two straight sides are called arms The angle is the amount of turn between each arm. How to Label Angles Exploring Math With Technology Kidspiration Activities - Math Standard: Money (K) 6A.3.a; (Gr. 1, 2) 6A.3.b; Fractions (Gr. 1, 2) 6A.2.a See what's happening in the computer lab Examples of Math (and Language Arts) activities created by primary grade students. Math Standard: 1B.1.a - Kidspiration, KidPix, Windows Paint, Graph Club, MS Word, and Excel Miss Damush's second grade students made graphs for an online project- "Graph Goodies" Mrs. Hall's Kindergarten students use Graph Club. Ms. Page numbers for BCRs refer to pages in the handouts for this session. Standard 1.0 - Knowledge of Algebra, Patterns, or Functions Pattern Blocks - Math Standard: (Gr. Standard 3.0 - Knowledge of Measurement Teaching Time - Click on "Whole Class Clock" and "Games" for each year. Standard 4.0 - Knowledge of Statistics Interpreting Data - Math Standard: (Gr. 1) 4A.1.b Sample BCR (p. 15) Online Graph Maker - Math Standard: (Gr. 1, 2) 4A.1.d Sample BCR (p. 16) Standard 6.0 - Knowledge of Number Relationships or Computation Mrs.

Murderous Maths: Tricks and Games! Do you want to be a mind reader? Or maybe have a brain that does lightning calculations? Or maybe you just want to make your friends feel silly! Here are a few of my sneakiest tricks, and don't worry - you don't need to be a maths genius to do them! Some of these tricks are in the Murderous Maths books, but here I can let you play on my special calculators and other computer gadgets! The Fiendish Football Team Illusion! Let Riverboat Lil READ YOUR MIND! The EIGHT QUEENS Puzzle! The 7-11-13 Trick (And other miracle sums) Pass your friends a calculator - and then make them feel really silly with these simple tricks! The Predictor Cards The trick with four cut-out cards, you pick a number from 1-16 and it mysteriously appears in a hole at the back! The Missing Digit Trick Your friend does a sum then crosses a digit out - you can tell what it is without looking! The Prime Numbers Trick Make a strange prediciton using the magic of PRIME NUMBERS. What were you like when you were born?

Dimensions Home A film for a wide audience! Nine chapters, two hours of maths, that take you gradually up to the fourth dimension. Mathematical vertigo guaranteed! Background information on every chapter: see "Details". Click on the image on the left to watch the trailer ! Free download and you can watch the films online! The film can also be ordered as a DVD. This film is being distributed under a Creative Commons license. Now with even more languages for the commentary and subtitles: Commentary in Arabic, English, French, German, Italian, Japanese, Spanish and Russian. Film produced by: Jos Leys (Graphics and animations) Étienne Ghys (Scenario and mathematics) Aurélien Alvarez (Realisation and post-production)

Absorb Learning MathNook Math Games Addition, Subtraction, Multiplication and Division Teaching Ideas All Four Operations: Maths Karate - A wonderful way of reinforcing understanding of addition, subtraction, multiplication and division vocabulary. Inverse Operations Triangles - Printable triangles which can be used when showing children how operations are linked to their inverse. Contributed by Scott Evans. Multiplication and Division: Multiplication and Division by 10, 100 and 1000 - A grid which can be used to support multiplication and division by 10, 100 and 1000. Maths Operations Resources:

Detexify LaTeX handwritten symbol recognition Want a Mac app? Lucky you. The Mac app is finally stable enough. See how it works on Vimeo. Download the latest version here. Restriction: In addition to the LaTeX command the unlicensed version will copy a reminder to purchase a license to the clipboard when you select a symbol. You can purchase a license here: Buy Detexify for Mac If you need help contact mail@danielkirs.ch. What is this? Anyone who works with LaTeX knows how time-consuming it can be to find a symbol in symbols-a4.pdf that you just can't memorize. How do I use it? Just draw the symbol you are looking for into the square area above and look what happens! My symbol isn't found! The symbol may not be trained enough or it is not yet in the list of supported symbols. I like this. You could spare some time training Detexify. The backend server is running on Digital Ocean (referral link) so you can also reduce my hosting costs by using that referral link. Why should I donate? Hosting of detexify costs some money. No. Yes.

The Quadrants of the Cartesian Plane The Quadrants of the Cartesian Plane (page 3 of 3) Sections: Introduction to the plane, Plotting points, The four quadrants The two axes divide the plane into four sections called "quadrants". The quadrants are labelled with Roman numerals (not Arabic numerals), starting at the positive x-axis and going around anti-clockwise: When you get to trigonometry, this method of numbering the quadrants will make perfect sense and will be very useful. In which quadrant is the point (–2, –3)? The simplest way for me to answer this is to plot the point: Now I can see that the point (–2, –3) is in Quadrant III. In which quadrant is the point (4, y)? Since they don't tell me what the value of "y" is, then y can be anything. By plotting a bunch of points that "work", I can see that the "point" (4, y) is actually an entire line: the line "x = 4", which passes through two quadrants! Quadrants I and IV. By the way, please use standard notation. In which quadrant is / are the point(s) (x, y), such that xy < 0?

Number Loving

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