National Council of Teachers of Mathematics
Scale Factor
Does doubling mean everything doubles? Learners adjust the scale factor between two rectangles. Using the calculated measurements, pupils investigate the ratios between the lengths, perimeters, and areas of the rectangles.
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How Much Is a Billion?
Students get a sense of how big a billion really is. This is necessary in order to explain deep time.
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"Water is Life" Global Water Awareness
Students examine and calculate the percentage of potable water remaining on the earth. In this ecology and geography lesson, students brainstorm the main factors affecting water distribution. Students use mathematical problem solving to...
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Percents: What's the Use
Young scholars research percentages in real world situations. In this percents lesson, students demonstrate their ability to apply percents to everyday situations. Young scholars communicate mathematically by conducting interviews about...
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So You Would Like a Wind Farm, Eh?
Students collect and analyze data correctly. In this statistics lesson, students use central tendencies to analyze collected data. They calculate where a wind farm will be placed, based on the data.
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Proportions a/b=c/d
Students calculate distance and proportion of objects. In this algebra instructional activity, students define proportion and how it is used in math. They solve the problem through guided instruction.
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Infinite Decimals
Can you support the argument that the decimal 0.99999 ... is equivalent to the number one? The seventh installment in this 25-part module gives convincing support for this conclusion. Pupils write infinite decimals using powers of 10....
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Number Up
Students explore the concept of order of operations. In this order of operations lesson, students play a card game where students in the group have 5 cards. Students must use addition, subtraction, multiplication, and division to make...
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comparison of Two Gender Sports Teams
Students gather data on sports team and create a box and whisper plot. In this data collection lesson, students find the median, the quartile range, and relationships between variables.
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Positive and Negative Integers: A Card Game
Students play an integer card game similar to the game "Twenty-five." In this integer lesson, students use addition and subtraction cards to identify integers as positive or negative.
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Number Line Game
Students understand number line concepts and the addition of positive and negative integers. In this number line lesson, students create and use a number line to play a game. Students will use different colored dice to represent positive...
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Local History: Mapping My Spot
Students explore maps to discover historical information about their local area. For this mapping and history lesson, students use panoramic maps of their own town/city to interpret historical information. Students also place...
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How Much Water is There?
Students investigate the amount of fresh water on earth and which water can be used for consumption. In this fresh water lesson plan, students calculate the amount of fresh water that can be used for consumption on earth. They use a 5...
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A Steep Hike
Students explore slope. In this middle school mathematics lesson plan, students analyze and interpret graphs as they investigate slope as a rate of change. Students use a motion detector to collect data as they walk at different speeds...
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Living in Base Ten
Students explore scientific notation and the structure of the metric system. In this middle school mathematics lesson, students read How Much is a Million? by David M. Schwartz to introduce students to the need for scientific notation. ...
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Approximate Solution to an Equation
Students solve equations through trial and error. In this algebra instructional activity, students first estimate their answers and then calculate it to check their work. They solve problems involving roots and integers.
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Maya Math: From Zero to Nineteen
Students explore counting methods of the ancient Maya, and practice identifying Maya number glyphs.
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Light Beam
Students measure and convert between units. For this geometry lesson, students investigate through measurements of distances. They relate the properties of circle to solving problems with radius, diameter and area.
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Clock Arithmetic and Cryptography
Students explore the concept of modular arithmetic and cryptography. In this modular arithmetic and cryptography lesson, students use applets to explore modular arithmetic using a clock and Caesar Ciphers. Students exchange their ciphers...
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Pardon Me. Do You Have Change For a Dollar?
Upper elementary and middle school learners explore currencies from a variety of countries. They use the Internet, video, and engage in hands-on activities. They practice converting U.S. currency to foreign currency and vice versa. This...
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Roman Numerals
Pupils explore the concept of Roman numerals. They investigate the seven basic numerals and the symbols that are used in the Roman numeral system and their values. Students practice converting Roman numerals.
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Marshmallow Moosy
Young scholars stack several different colored marshmallows-one on top of the other-in the tall cylindrical container. They ct a cardboard disk to fit snugly inside of the container on top of the marshmallow stack using a compass if...
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Distance on the Coordinate Plane
Apply the Pythagorean Theorem to coordinate geometry. Learners find the distance between two points on a coordinate plane by using the Pythagorean Theorem. The vertical and horizontal change creates a right triangle, which allows...
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Geometric Relatioships
Students explore measurements and geometric formulas. In this geometry lesson, students investigate pi as it relates to geometry. They collect data and use a chart to organize the data.