# Bibliothèque virtuelle en mathématiques

Number Pieces by The Math Learning Center Overview Number Pieces helps students develop a deeper understanding of place value while building their computation skills with multi-digit numbers. Students can: Use number pieces to represent multi-digit numbers, regroup, add, subtract, multiply, and divide. Use edge pieces to display the dimensions of arrays created with number pieces.

The Elementary Math Maniac: A Fun Free Tool for Practicing Counting If you have ever been in a K-2 math class, you know how important counting is. I recently posted some of my favorite you tube videos for practicing counting, my favorite counting books, and have written a seven part series on estimating and counting routines that I use in my classroom. I have also written about interventions I use to help kids learn to count. Teacher Tools for Interactive Whiteboards ↓ Skip to Main Content Home Resources Teacher Tools Numbers to Ten on the TenFrame Using a two by five array, the TenFrame supports the use of five as an anchor for early number sense. View Teacher Tool View Teacher Tool in Spanish Download Sample Lesson Plan

cocalc CoCalc does not support Firefox version 43. We recommend that you use the newest version of Google Chrome. Learn more about our browser requirements. Use CoCalc anyways with my unsupported browser... Number Frames Overview Number Frames help students structure numbers to five, ten, twenty, and one hundred. Students use the frames to count, represent, compare, and compute with numbers in a particular range. The frames help students see quantities as equal groups of other quantities and in relation to benchmark quantities. This helps primary students move away from one-by-one counting toward more efficient ways of counting and computing. As students advance, custom frames can be constructed to help visualize factors, products, fractional parts and more.

Fractions by The Math Learning Center How To Use Fractions Working with Fraction Bars and Circles More Toolbar Items The eClock - Learn all about time - Interactive Clock Digital On/Off Words On/Off Roman/Arabic To rotate the hands on the interactive e-Clock, move the cursor over the clock face, press the left mouse button down and move the mouse. Rotate the mouse clockwise around the centere of the e-Clock to move the time forward and move the mouse in an anticlockwise direction around the center of the eClock. to move time backwards. Notes 1st Grade Math Games and Videos Practice counting skills in this fun online game. Find the matching cards. Count up the leaves shown and find the card that shows the same number. Computer Algebra I: Mathematica, SymPy, Sage, Maxima - Hyperpolyglot a side-by-side reference sheet sheet one: grammar and invocation | variables and expressions | arithmetic and logic | strings | arrays | sets | arithmetic sequences | dictionaries | functions | execution control | exceptions | streams | files | directories | libraries and namespaces | reflection sheet two: symbolic expressions | calculus | equations and unknowns | optimization | vectors | matrices | combinatorics | number theory | polynomials | trigonometry | special functions | permutations | descriptive statistics | distributions | statistical tests bar charts | scatter plots | line charts | surface charts | chart options

Gravitational waves – your questions answered The final piece of Einstein's general theory of relativity, which has stubbornly evaded detection since his predictions a century ago, has been detected. Scientists announced today at a press conference they’ve successfully picked up gravitational waves, formed during the cataclysmic collision and fusion of two mammoth black holes 1.3 billion light-years away. Not only does this confirm Einstein’s predictions, it gives astronomers a new method of “seeing” the Universe. Nailing down gravitational waves – ripples through the fabric of space-time – has not been an easy task. Even Einstein was pessimistic about finding the miniscule vibrations. Indeed, in 2014 the astrophysics world was elated with the announcement that the Background Imaging of Cosmic Extragalactic Polarisation (BICEP2) telescope at the South Pole had picked up faint echoes of the Big Bang, only to have those hopes dashed when the signal turned out to be dust in our own galaxy.

Money Pieces by The Math Learning Center How To Use Money Pieces Working with Pieces Working with Shades Shades with illustrations can be used to pose problems with unknown quantities of money More Toolbar Items Interactive Fraction Wall explore Fractions Percentages and Decimals Fraction walls are a great way to teach about fractions and in particular equivalent fractions. In a fraction wall each row or layer of the wall represents one whole number. The layers are divided into a number of bricks and hence each brick represents a fraction whose denominator is equal to the number of bricks in that layer. Each brick can be turned on or off by clicking it. This wall also allows the display of decimal and percentage values. To the right of the wall are boxes which can be hidden, the value of each box is fraction of the wall that has been turned on.

Fun Kids Online Math Games "Sheppard offers everything from early math to pre-algebra. The lessons include interactive activities to practice concepts. Students can shoot fruit, pop balloons, and even play math man (the math version of pac man!).

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