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Lesson Plan
Illustrative Mathematics

Illustrative Mathematics: F Le Illegal Fish

For Teachers 9th - 10th Standards
In this task, students learn about exponential functions when they investigate the exponential growth of an invasive fish population. Aligns with F-LE.B.5 and F-LE.A.1.c.
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Lesson Plan
Illustrative Mathematics

Illustrative Mathematics: F Le Us Population 1982 1988

For Teachers 9th - 10th Standards
In this task, students are shown a table of U.S. population data between 1982 and 1988 and are asked to explore whether linear functions would be appropriate to model relationships within the data. Aligns with F-LE.B.5 and F-LE.A.1.b.
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Lesson Plan
Illustrative Mathematics

Illustrative Mathematics: F Le Identifying Functions

For Teachers 9th - 10th Standards
In this task, learners are shown a table with linear, quadratic, and exponential functions at various values of x and are asked to match the function type to each data set and explain their reasoning. Aligns with F-LE.A.1.b and F-LE.A.1.c.
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Lesson Plan
Illustrative Mathematics

Illustrative Mathematics: F Le Basketball Rebounds

For Teachers 9th - 10th Standards
The purpose of this task is to introduce students to an exponential decay function in the form f(x) = abx, with a concrete interpretation of the decay factor b. A table shows the rebound height of a basketball for each successive bounce....
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Lesson Plan
Illustrative Mathematics

Illustrative Mathematics: F Le Choosing an Appropriate Growth Model

For Teachers 9th - 10th Standards
The goal of this task is to examine some population data for large cities from a modeling perspective. Young scholars are asked to decide if the population data can be accurately modeled by a linear, quadratic, and/or exponential...
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Lesson Plan
Illustrative Mathematics

Illustrative Mathematics: F Le Basketball Bounces, Assessment Variation 1

For Teachers 9th - 10th Standards
This task asks young scholars to analyze a set of data about the height of a basketball for each time it bounces. They choose a model that reasonably fits the data and use the model to answer questions about the physical context. This...
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Lesson Plan
Illustrative Mathematics

Illustrative Mathematics: F Le Basketball Bounces, Assessment Variation 2

For Teachers 9th - 10th Standards
This task asks students to analyze a set of data about the height of a basketball for each time it bounces. They choose a model that reasonably fits the data and use the model to answer questions about the physical context. This second...
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Lesson Plan
Illustrative Mathematics

Illustrative Mathematics: F Le Carbon 14 Dating in Practice Ii

For Teachers 9th - 10th Standards
This problem introduces Carbon 14 dating which is used by scientists to date certain organic material. This version is based on the ratio of Carbon 14 to Carbon 12, which decreases at a constant exponential rate after an organism dies....
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Lesson Plan
Illustrative Mathematics

Illustrative Mathematics: F Le, a Rei Population and Food Supply

For Teachers 9th - 10th Standards
In this task, students analyze the sizes of a country's population and of its food supply to determine when and if food shortages will occur. To solve it, they must construct and compare linear and exponential functions and find where...
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Unknown Type
Rock ’N Learn

Rock 'N Learn: Happy Birthday! Le

For Students 1st - 2nd
This printable -le worksheet from Rock 'N Learn can be used as a reinforcement activity or as an assessment. With the use of a pictures cue, students will fill in words to complete sentences that contain words which end in -le. An answer...
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Lesson Plan
Illustrative Mathematics

Illustrative Mathematics: F le.a & N Rn Extending the Definitions of Exponents 2

For Teachers 9th - 10th
A biology student is studying bacterial growth. She was surprised to find that the population of the bacteria doubled every hour. Aligns with the F-LE.A and N-RN.A.1 standards.
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eBook
Blackdog Media

Classic Reader: Concerning a Poor Man Who Was Called Le Vieux Par Chemins

For Students 9th - 10th
Classic Reader provides numerous classic works from famous authors. One work is "Concerning a Poor Man Who was Called Le Vieux Par-Chemins," a piece from the early 1800's. This story was written by the French author named Honore de Balzac.
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Primary
Blackdog Media

Classic Reader: "Some Strange Disturbances in Aungier Street" by Joseph Le Fanu

For Students 9th - 10th
This site features the full text of the short story "An Account of Some Strange Disturbances in Aungier Street" by Joseph Sheridan Le Fanu.
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Primary
Blackdog Media

Classic Reader: "An Authentic Narrative of a Haunted House" by J. S. Le Fanu

For Students 9th - 10th
This site features the full text of the short story "An Authentic Narrative of a Haunted House" by Joseph S. Le Fanu.
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Handout
Alabama Humanities Foundation

Encyclopedia of Alabama: Le Moyne Brothers

For Students 9th - 10th
Originally natives of Montreal, New France, four Le Moyne brothers are credited for the discovery and colonization of Alabama, as presented in this resource.
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eBook
Blackdog Media

Classic Reader: Green Tea by Joseph Sheridan Le Fanu

For Students 9th - 10th
This is the full text of the novel Green Tea by Joseph Sheridan Le Fanu, an Irish writer of Gothic tales, mystery novels, and horror fiction. A drink opens the inner eye of the protagonist. What follows is a mind-boggling tale of...
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Lesson Plan
Illustrative Mathematics

Illustrative Mathematics: F Le Boiling Water

For Teachers 9th - 10th
Young scholars are shown two tables of data showing the approximate boiling point of water at different elevations. Both data sets can be modeled by linear functions but with different slopes. When the tables are combined, however,...
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Lesson Plan
Illustrative Mathematics

Illustrative Mathematics: F Le Exponential Kiss

For Teachers 9th - 10th Standards
The purpose of this task is to use technology to study the behavior of some exponential and logarithmic graphs and to manipulate some explicit logarithmic and exponential expressions. Aligns with HSF-LE.A.4, F-BF.B.5, and F-IF.C.7.e.
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Lesson Plan
Illustrative Mathematics

Illustrative Mathematics: F Le Do Two Points Determine an Exponential Function?

For Teachers 9th - 10th
In this task, students investigate whether exponential functions will always be determined by two points. It complements the task "Do two points always determine a linear function?" Aligns with F-LE.A.2.
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Lesson Plan
Illustrative Mathematics

Illustrative Mathematics: F Le.4 Graphene

For Teachers 9th - 10th
This task provides a real-world context for examining the power of exponential growth and decay. Young scholars experiment, at the macro level, using scotch tape to pull a chip of graphite apart into two pieces. They are asked to find...
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Lesson Plan
Illustrative Mathematics

Illustrative Mathematics: F Le a Valuable Quarter

For Teachers 9th - 10th
The context of this task is that a quarter was put into a bank account in 1901 and students are asked to calculate its value in 2013 at two different interest rates. Those amounts are compared to the appreciation rate of a rare and...
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Lesson Plan
Illustrative Mathematics

Illustrative Mathematics: F Le in the Billions and Exponential Modeling

For Teachers 9th - 10th Standards
For this task, students examine world population data from 1804 to 2012 and investigate whether an exponential function is appropriate for modeling the relationship between the world population and the year. Aligns with F-LE.A.1.c.
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Lesson Plan
Illustrative Mathematics

Illustrative Mathematics: F Le Carbon 14 Dating, Variation 2

For Teachers 9th - 10th Standards
In this task on exponential decay, students calculate what the amount of Carbon 14 left in a preserved plant will be as time passes and when one microgram will be all that is left. Aligns with F-LE.A.1.c.
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Lesson Plan
Illustrative Mathematics

Illustrative Mathematics: F Le Carbon 14 Dating in Practice I

For Teachers 9th - 10th Standards
In this task, students learn about exponential decay by examining the amount of Carbon-14 left in a preserved plant with the passage of time after the plant has died. This provides a simple introduction to Carbon-14 dating but the actual...

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