Curated OER
Irregular Fractals
Students study and research irregular fractals and construct a few based on their research. Students practice pattern recognition skills and plane geometry skills calculating dimensions on the Fractured Pictures activity.
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The Mandelbrot Set
Young scholars explore the Mandelbrot Set. They are introduced to the concept of a complex number and function in order to motivate the discussion of Julia and Mandelbrot sets. Students investigate fractals and how they are built.
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Inventors Timelines
Students create a class timeline using the patent year for their selected inventor or invention. Using a piece of yarn, they physically create a timeline, and create and answer math word problems using the years from the timeline.
Pennsylvania Department of Education
Alike and Different
Students compare and contrast objects and are introduced to a Venn Diagram. In this alike and different instructional activity, students make observations regarding properties of objects. Students classify object and build ideas about...
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What Do I Really Have to Gain?
Second graders further develop simple addition facts and their ability to record the facts.
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Array to Go!
Second graders are introduced to arrays as a means for multiplication readiness. Once students are comfortable with naming the array by counting the columns and rows, they integrate skip counting.
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Comparing Notes: a Mathematical Exploration of the Piano
Students examine the history of equal temperament, the modern standard of tuning a piano. Proportion calculations of octaves and perfect fifths are utilized to calculate the frequency of each note in a major scale.
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Numbers Up
Students use Legos to build representations of a variety of numbers. They then sort and order their representations and pair them with the written number.
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Aldridge Sawmill -- The Story in Numbers
Seventh graders view a recent transparency of the average rainfall zones of the state of Texas. Using another transparency, they identify the Piney Woods subregion of the Gulf Coastal Plain and locate national forests and sawmills. ...
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Grade 3: Pretzel Probability
Third graders discuss prizes included in products to stimulate sales. They discuss a pretend pretzel company and it's sticker promotion. Students compute how many boxes of pretzels they will need to collect in order to be sure of having...
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Multiple Ways to Add and Subtract
Third graders recall multiplication facts to tens. They recall factors of numbers generated by multiplication facts to ten. Students become familiar with the use of brackets in notation. They multiply two digit numbers by a single...
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Number in Geometry
Students use a number line to assist with their additions. They use a calculator to check for factors. Students are taught factors and multiples. They use array model of multiplication to define meaning. Students develop a wide range of...
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Thrust to Weight Ratio and Excess Thrust
Students, after reading an explanation from a NASA Web site, demonstrate an understanding of the text by applying it to questions involving the Thrust to Weight Ratio and Excess Thrust of an aircraft.
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Cartesian Coordinate System
Students research the Cartesian Coordinate System and its many uses in the world of mathematics and algebra.
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You're the Cashier!
Third graders use manipulatives and computers to count back change from amounts up to $5.00.
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Lollies, Lollies, Lollies
Students listen to the problem read to them. They answer some simple questions using number sentences. They then compose a written record of the solution and share their approaches used.
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Parking Meters
Third graders are introduced to the problem with a short discussion about parking. They then solve with a partner. As they work ask questions that focus on the strategies they are using to make the calculations.
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Modeling With Circular Functions
Students explore circular functions. They identify the amplitude, period, phase shift and vertical shift of circular functions. Students analyze phenomena described by sine waves and they find mathematical models for transforming images...
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Double Dipping
Fifth graders find and display all possible pairs of flavors of ice cream and look for patterns in the results. They discuss strategies for finding all combinations of flavors. Students explain and write a description for the pattern...
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And Around We Go!
Sixth graders conduct a survey and collect data to construct a bar graph that will then be changed into a circle graph. With the bar graph, 6th graders compare estimated fractions and percentages and estimate percentages. With the circle...
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Who Has More?
Students engage in a activity that is concerned with the standard of comparing the quantities of whole numbers using different strategies from the concrete to the abstract. They count objects and compare them, use symbols of comparison,...
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Mathematical Relationships
Students practice graphing a linear equation and a parabolic equation. They work cooperatively to select numbers, including fractions, which they will put into ordered pairs. Students explain their process to the class, discussing what...
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the Whale Game
Students listen to whale stories and answer addition and subtraction problems in the stories. In this addition and subtraction lesson, students receive 20 goldfish. Based on the story they eat the goldfish. Students write number...