Interactive Excel Spreadsheets Developer's Guide to Excelets: Dynamic and Interactive Visualization with "Javaless" Applets or Interactive Excel Spreadsheets Excelets are interactive Excel spreadsheets or simulations of mathematical models. Some of the new interactive spreadsheets are done in Google Sheets (very Excel-like), which has great data pooling capabilities, see Data Pool in the Cloud for more information and activities or read Oh Sheets! Here are some examples of Excelets in chemistry and mathematics (For best results - right click and then select Save Target As... to download, then open directly in Excel) : For more Excelets in general chemistry, see the Chemical Excelets page and for materials science, see the MatSci Excelets page. How do I get started developing Excelets? The basics of developing interactive computational Excel spreadsheets are described in An Interactive Higher-Order Thinking Tool, which includes an Excel tutorial to get you started. Scott A.
Math Tools A community library of technology tools, lessons, activities, and support materials for teaching and learning mathematics. New to Math Tools? Welcome! There's a lot of stuff in here. Join our community! View our Orientation to get some ideas of how to make the most of this resource. Announcements Travel Grant Opportunity: ICME 2016: Hamburg, Germany Applications for travel grants are now available to attend the Thirteenth International Congress on Mathematical Education (ICME-13), to be held in Hamburg, Germany from July 24-31, 2016. What's Hot? [June 25] Touch Decimal: Maurici writes, "In a few days, (end of June 2015) I will launch the new free Android app: Touch Decimal." June 30, 2015: Tracey, Max, Annie, Suzanne, Richard, Steve, Jay, Tony Tool: Pick-a-Pathby NCTM Illuminations
From Grove to You | Florida Agriculture in the Classroom (FAITC) Brief Description: Students will trace the production of oranges from the grove to the store as fresh fruit and as juice. Students will become citrus growers and join a co-op to determine the best ways to market and sell their fruit. Objectives: Students will be able to: Identify steps of citrus production from the tree to the store.Calculate the acreage needed for a citrus grove based on a real-life example.Describe the purpose, structure and function of a cooperative.Use the Internet to obtain information about orange juice production. Time: Two, 45 minute class periods, plus time for Internet research Downloads:
The 2014 Tax Brackets Introduction Every year, the IRS adjusts more than forty tax provisions for inflation. This is done to prevent what is called “bracket creep.” This is the phenomenon by which people are pushed into higher income tax brackets or have reduced value from credits or deductions due to inflation instead of any increase in real income. The IRS uses the Consumer Price Index (CPI) to calculate the past year’s inflation and adjusts income thresholds, deduction amounts, and credit values accordingly. Income Tax Brackets and Rates In 2014, the income limits for all brackets and all filers will be adjusted for inflation and will be as follows (Table 1). The top marginal income tax rate of 39.6 percent will hit taxpayers with an adjusted gross income of $406,751 and higher for single filers and $457,601 and higher for married filers. Source: Internal Revenue Service Standard Deduction and Personal Exemption The standard deduction will increase by $100 from $6,100 to $6,200 for singles (Table 2).
Core Math Tools Home Use by Teachers and Students Core Math Tools can be saved on a computer or USB drive, making it possible to use without Internet access. Files can be saved and reloaded by students and teachers. Its portability allows easy access for students, teachers and parents outside the classroom. Core Math Tools will automatically check for updates when launched and Internet access is available. Core Math Tools Conference Sessions 2013 Teaching and Learning with Technology Symposium at the AMTE Conference Core Math Tools and Its Affordances for Teacher Educators and for Prospective Teachers -- Download the session PowerpointPresenters: Christian Hirsch, Pat Hopfensperger, Gary Martin, and Rose ZbiekIn this symposium, the presenters provide an overview of the features of NCTM's Core Math Tools, together with three perspectives on its use with prospective secondary school mathematics teachers. 2012 NCTM Regional Conference in Chicago 2012 NCTM Regional Conference in Dallas
Khan Academy From Canes to Grains | Florida Agriculture in the Classroom (FAITC) Brief Description Students will trace the production of sugar from the field (sugar canes) to the granulated sugar (grains of sugar) in writing and with a flow chart, exploring this topic on the Internet. Students will solve real-world mathematics problems involving measurements and real-world data. Objectives: Students will be able to: Identify and describe the chemical and physical changes in the production of sugar.Convert units of measure in a recipe.Use the Internet to obtain information about sugar production. Time 3, 45 minute class periods, plus time for Internet research Downloads
When Work Is Punished: The Tragedy Of America's Welfare State Exactly two years ago, some of the more politically biased progressive media outlets (who are quite adept at creating and taking down their own strawmen arguments, if not quite as adept at using an abacus, let alone a calculator) took offense at our article "In Entitlement America, The Head Of A Household Of Four Making Minimum Wage Has More Disposable Income Than A Family Making $60,000 A Year." In it we merely explained what has become the painful reality in America: for increasingly more it is now more lucrative - in the form of actual disposable income - to sit, do nothing, and collect various welfare entitlements, than to work. This is graphically, and very painfully confirmed, in the below chart from Gary Alexander, Secretary of Public Welfare, Commonwealth of Pennsylvania (a state best known for its broke capital Harrisburg). But perhaps the scariest chart in the entire presentation is the following summarizing the unsustainable welfare burden on current taxpayers:
Online tools - maths online One of many scientific calculators on the web. It accepts brackets, functions like sin, cos, tan, exp, log, sqrt, pow, asin, acos, atan, gamma, the constants E und PI. On the calculator's web page you find a detailed description. In a cooperation between the author and maths online in the beginning of 2000, the calculator's functionality has been extended. (The above version is loaded from the maths online website. Its original location is there). By the way: the plot is a gif-file and can be saved on your PC by a right mouse click. This page is a bit difficult to survey: The result is a web document looking exactly like the input page. Numerical tools on linear algebra: Computer algebra systems (CAS) are able to perform symbolic and numeric computations, simplify expressions, solve equations and differential equations, plot function graphs, differentiate, integrate, and much more. Dynamical geometry on the web may be found at the following sites.
Introductory Statistics Practice Quiz Before you begin a statistics course, you may want to get an idea of what you know and what you need to learn. The test will answer some of these questions for you. The test consists of 50 multiple-choice questions covering the topics in this book. Although 50 questions can't cover every concept, skill, or shortcut taught in this book, your performance on the test will give you a good indication of your strengths and weaknesses. Keep in mind, the test does not test all the skills taught in this statistics book. If you score high on the test, you have a good foundation and should be able to work your way through the book quickly. Take as much time as you need to do the test. Quiz The time it takes an employee to drive to work is the variable of interest. For problems 5 and 6, consider the following 12 data points: 10, 12, 10, 18, 16, 15, 9, 14, 11, 13, 12, and 16. What is the median of these data? Use the following information for problems 11, 12, and 13. Megan was late to work today.
Computational Skills for Biology Students June 2006 Why is it important to develop computer savvy students of biology? Understanding quantitative research is critical to grasping biology. A good fraction of modern biology is heavily quantitative. Photo: Microsoft Images. Gross: A good fraction of modern biology is heavily quantitative, and one of the main complaints that I have heard for a very long time from biologists is that students do not have the capability to carry out the basic quantitative research that is critical to all modern biology across the spectrum. Graphing is a required basic skill. One of the most distressing comments has been about the simplest things: reading, interpreting, and producing graphs—simple graphs that students have seen again and again since they were in elementary and middle school. Perhaps the simplest illustration of this point is the basic way we communicate science, which requires a quantitative framework for understanding. How do teachers go about helping students become more computer savvy?