10 More Unsolved Mysteries of the World Mysteries There is no doubt that some of our most popular lists are ones which revolve around mystery and intrigue. Fortunately for us all, there is no end to the number of weird and wonderful mysteries in the world, so we are now able to present our fourth list of unsolved mysteries. Over the last few decades, miners in South Africa have been digging up mysterious metal spheres. In 1938, an archaeological expedition led by Dr. Beginning in the 1930s, the father of Dr. Giant Stone Balls of Costa Rica Workmen hacking and burning their way through the dense jungle of Costa Rica to clear an area for banana plantations in the 1930s stumbled upon some incredible objects: dozens of stone balls, many of which were perfectly spherical. The Oera Linda Book is a controversial Frisian manuscript covering historical, mythological, and religious themes that first came to light in the 19th century. Fossils, as we learned in grade school, appear in rocks that were formed many thousands of years ago.
Multiplication Games This past Thursday night, my school held a "Family Math Night" where each grade level (Pre-K to 4th) created 3 to 4 different Math games (more like ideas) that parents could take home and utilize with their kids. Since I teach 4th Grade, our entire Math Night focused on Place Value to the 10ths and 100ths and Multiplication - memorization of the basic multiplication facts (which in Texas is 0-12...). The other Math teacher for 4th Grade and I really scrambled over this night - we fretted over what games to play. We wanted the games to be FUN and also a way for our students to play with their parents or siblings - a shared learning experience. We didn't just want to do single player games - the focus of the night was, after all, FAMILY Math Night. So, off we set until we came up with the following 4 actvities:1. Now, we cannot take credit for the inception of this game. Now, it is ABSOLUTELY important that you read the instructions. 2. What I love about this game?? 3. 1. 4. The game board:
Free Online Course Materials | Mathematics Human chemistry In chemistry, human chemistry is the study of reactions between people.  American self-defined 'human chemist' Thomas Dreier, gave the following definition of the subject of human chemistry, in 1948, considering people viewed atomically as human chemicals:  “Human chemistry, the study of how people ‘chemically’ react to one another, is an important branch of the science of human nature.” A central aspect in human chemistry is the definition of the person as a "human molecule", a term coined by French philosopher Jean Sales in 1789, being the atomic definition of a person.  In this perspective, human chemistry is the quantitative study of reactions between human molecules and the structures they form. This is expressed clearly by American historian Henry Adams who in 1885 gave the following definition of human chemistry (or rather 'social chemistry' as he called it):  A + B → AB (bond formation)AB → A + B (bond dissolution) Short history Goethe's affinity table
65 Free Interactive Whiteboard Resources Interactive whiteboard resources are a great way for teachers to engage classrooms in learning. While many teachers are spending hours a day creating their own activities for their interactive whiteboards, there are tons of free sources to help teachers learn about and use IWBs with students to further their use of technology in the classroom. Here is a list of some great interactive whiteboard resources and activities guaranteed to stimulate learning: General Interactive Whiteboard Resources for Teachers TeacherLED – TeacherLED is a site dedicated to making the use of Interactive Whiteboards (IWB) easier and more productive. A few ways that you can stay and healthy fit this school year. Learning isn’t as one-way as we tend to think. Our goal-setting teaching strategies to pass along to your students. Our guide to purpose drivel learning, a classroom management technique you... A few classroom management suggestions that can help to reduce a child’s...
Hidden Video Courses in Math, Science, and Engineering » Data Wrangling Blog Hidden Video Courses in Math, Science, and Engineering Over the last few years, a large number of open courseware directories and video lecture aggregators have popped up on the web. These sites often include introductory courses and research seminars, but it can be difficult to find full courses covering advanced topics. What motivated me to pull this together? It is difficult to find advanced math and physics courses that fit into a full time work schedule. The approach I came up with was to load an Archos video player with video lectures from the web (an iphone would probably work just as well). Most video players now come with wifi built in, so if you have wireless access at your gym you should be ready to go. Enough motivation, on with the links: Links to Advanced Courses with Complete Video Lectures: Update (02/10/09): I've bookmarked 20 new video courses since the original post was published on April 09, 2008. Physics Mathematics Computer Science & Engineering Machine Learning
The Chemistry of Love By MatchWhen sparks fly between two people, we're quick to say they have "chemistry." Not everyone realizes that such couples literally have do have chemistry--it's what's behind those sweaty palms, the jumpy stomach, thumping heart, and nervous jitters. Chemistry also contributes to that warm, comfortable feeling you get from being with a longtime partner. In the mid-1960's, psychologist Dorothy Tennov surveyed 400 people about what it's like to be in love. Many of her respondents talked about fear, shaking, flushing, weakness, and stammering. The most well-known love-related chemical is phenylethylamine -- or "PEA" -- a naturally occurring trace ammine in the brain. Feeling Dopey You can also get a non-romantic dose of PEA from high-intensity activities like skydiving, or by eating chocolate. One of the substances released by PEA is the neurochemical dopamine. In turn, Dopamine stimulates the production of oxytocin, sometimes known as "the cuddle chemical." When The Honeymoon's Over
Math Cross Puzzles Archive Math Cross Puzzle # 2 Number Patterns Math Cross Puzzle # 3 Associative Property: (5 + 6) x 2 Math Cross Puzzle # 4 Review 1 Math Cross Puzzle # 5 Measurement (inches, feet, yards) Math Cross Puzzle # 6 Money (pennies, nickels, dimes, quarters, dollars) Math Cross Puzzle # 7 Addition, Subtraction, Multiplication & Money Math Cross Puzzle # 8 Measurement (ounces, pounds, tons) Math Cross Puzzle # 9 Review 3 Math Cross Puzzle # 10 Money (addition) Math Cross Puzzle # 11 Time (seconds, minutes, hours, days) Math Cross Puzzle # 12 Review 4 Math Cross Puzzle # 13 Place Value (thousands, hundreds); multiplication (by 2-digit numbers) Math Cross Puzzle # 14 Simple word problems Math Cross Puzzle # 15 Review 5 Math Cross Puzzle # 16 Rounding numbers (to nearest tens, hundreds) Math Cross Puzzle # 17 Review 6 Math Cross Puzzle # 18 Money (making change) Math Cross Puzzle # 19 Time (days, weeks, months, years); multiplication (by 3-digit numbers)
Vedic Maths - Find the DAY of the week in less than 30 seconds!!!! How Love Works" There are a lot of chemicals racing around your brain and body when you're in love. Researchers are gradually learning more and more about the roles they play both when we are falling in love and when we're in long-term relationships. Of course, estrogen and testosterone play a role in the sex drive area (see How Sex Works). Without them, we might never venture into the "real love" arena. That initial giddiness that comes when we're first falling in love includes a racing heart, flushed skin and sweaty palms. Researchers say this is due to the dopamine, norepinephrine and phenylethylamine we're releasing. Researchers are using functional magnetic resonance imaging (fMRI) to watch people's brains when they look at a photograph of their object of affection. Another possible explanation for the intense focus and idealizing view that occurs in the attraction stage comes from researchers at University College London.
Math Notebooking Marilyn Burns has written a concise article about the value of math journals. It's a wonderful introduction to the philosophy behind this instructional method. Basically, writing about math stimulates a different part of the brain than simply working the arithmetic alone. By using multiple parts of the brain during the learning process, the understanding is deepened and retention is increased. In fact, the more ways you can learn math (through art, music, drawing, writing for example) the more pathways you create in the mind. Also, writing about math may be a good lure for a reluctant writer who enjoys math. Amazingly, the process of writing and the process of mathematical problem solving have some similarities. Besides helping cement a child's learning, you, the teacher can find out if the child really understands the mathematical concept. Things to encourage in a math journal entry:
The Chemistry of Life: The Human Body Editor's Note: This occasional series of articles looks at the vital things in our lives and the chemistry they are made of. You are what you eat. But do you recall munching some molybdenum or snacking on selenium? Some 60 chemical elements are found in the body, but what all of them are doing there is still unknown. Roughly 96 percent of the mass of the human body is made up of just four elements: oxygen, carbon, hydrogen and nitrogen, with a lot of that in the form of water. Some of the more prominent representatives are called macro nutrients, whereas those appearing only at the level of parts per million or less are referred to as micronutrients. These nutrients perform various functions, including the building of bones and cell structures, regulating the body's pH, carrying charge, and driving chemical reactions. However, this does not exhaust the list of elements that you need. Carbon (18%) is synonymous with life. Fluorine (0.0037%) is found in teeth and bones.
menu cycle 3 Un peu de géométrie : Les droites parallèles : de quoi s'agit-il. Les droites parallèles des méthodes de tracé variées Hauteurs d'un triangle: page 1, page 2, page 3 Le musée, une situation pour décrire triangles et autres polygones Le jeu du portrait Tracer des symétriques Quelques expériences à propos de l'angle droit. Vues du cube Tétraèdres et autres polyèdres Les maths des petits cubes Un solide à construire par assemblage Le maître dessine. Qu'est-ce qu'un angle ? A propos du périmètre, de l'aire et du volume : Le périmètre, qu'est-ce que c'est ? L'aire, qu'est-ce-que c'est ? Une situation où on transforme des figures pour mieux distinguer l'aire du périmètre. Une autre situation visant le même but Calculer des aires Convertir les mesures d'aires Calcul du volume d'un pavé droit Problèmes numériques : Comment éviter que résoudre un problème se réduise à deviner l'opération Comment aider un élève à résoudre un problème ? les problèmes de vie courante Fractions : Formulations et introduction Exercices