background preloader

Related:  MathématiquesMath

The eClock - Learn all about time - Interactive Clock Digital On/Off Words On/Off Roman/Arabic How high can you count on your fingers? (Spoiler: much higher than 10) - James Tanton Many cultures throughout history have used versions of positional notation to represent numbers, in various bases too. The Sumerians of around 3000 BCE and the Babylonians of 2000 BCE used a base-60 notational system, some cultures followed a base-20 notational system, others base 12, and modern western culture uses base 10. These base numbers might well have been chosen from counting on fingers and toes (with base 60 being a combination of base-10 and base-12 thinking). Many historical units of weights and measures come in groups of twelve (there are twelve inches in a foot, for instance) most likely because it is easier to work with common fractions – halves, thirds, quarters – when one measures in groups of twelve. Modern western culture has vestiges of base-12 thinking in it: there are special names for the numbers 1 through 12 before moving onto a systematic naming system for 13 onwards, and people still talk of dozens and grosses.

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. Math In The City Welcome to Mathematics in the City Mathematics in the City (MitC) is a national center of research, curriculum development, and professional development for K-8 mathematics education. MitC is a part of The City College of New York, and, being aligned with the College, we aim for access and excellence for “the children of the whole people” of New York City and the nation. Our mission is to support powerful mathematics instruction. We guide teachers towards developing their classrooms into mathematics workshops in which learners are engaged in inquiry, worthwhile mathematical tasks, proving their thinking, and communicating it to their peer.

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. Today I want to share with you a great tool to use on your computer, projector or SMART board to help your students practice many important counting skills nctm This practical guide includes three 11" x 17" sheets to display the expectations across the four grade bands for each of the five Content Standards: Number and Operations, Algebra, Geometry, Data Analysis and Probability, and Measurement. (eBook) Connecting the NCTM Process Standards & the CCSSM Practices (PDF) Connecting the Standards, Improving Mathematical Instruction By connecting the CCSSM to previous standards and practices, the book serves as a valuable guide for teachers and administrators in implementing the CCSSM to make mathematics education the best and most effective for all students. Linking assessment to everday classroom instruction requires a shift in both thinking and practice. For many, the term assessment simply means grade. To help teachers, parents, administrators, and others better understand Principles and Standards, NCTM has compiled a document containing answers to questions regarding its purpose and content.

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. Counting by Tens off the Decade on a 100 Chart I was planning with my Kinder team today, and the discussion turned to skip counting by tens off the decade. Traditionally, when skip counting by tens was taught, we asked students to count the multiples of ten–10, 20, 30, etc. Counting by tens off the decade involves counting by tens from a number other than a multiple of ten, for example 7, 17, 27, etc. The hundred chart is a perfect tool for skip counting by tens because of the arrangement of numbers in rows and columns.

Math Lines - Addition ABCya is the leader in free educational computer games and mobile apps for kids. The innovation of a grade school teacher, ABCya is an award-winning destination for elementary students that offers hundreds of fun, engaging learning activities. Millions of kids, parents, and teachers visit each month, playing over 1 billion games last year. Apple, The New York Times, USA Today, Parents Magazine and Scholastic, to name just a few, have featured ABCya’s popular educational games. ABCya’s award-winning Preschool computer games and apps are conceived and realized under the direction of a certified technology education teacher, and have been trusted by parents and teachers for ten years.

Playdough Geometry: Exploring Shapes I love making learning fun in our homeschool...I try anyways! In an effort to do that, I find myself online a lot looking for inspiration. My search led me to TeachersPayTeachers where I found some cute printable shapes cards. And I decided right then we had to use them! You just need a few materials and you are ready for some hands-on geometry exploring shapes for your preschooler or elementary aged student! post may contain affiliate links.