Chemical Equilibrium
You can access the problems below via the Load Homework dialogue in the File menu of the Virtual Lab. They have been organized by concept and ranked by difficulty (A ranking of 1 denotes an easier problem; 5 is more challenging). Word files for these problems are provided so that you may edit and distribute the assignments in your classroom. The following types of problems can be found: Cobalt Chlorid and LeChatlier's Principle and DNA Binding.
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Molarity and Density
You can access the problems below via the Load Homework dialogue in the File menu of the Virtual Lab. They have been organized by concept and ranked by difficulty (A ranking of 1 denotes an easier problem; 5 is more challenging). Word files for these problems are provided so that you may edit and distribute the assignments in your classroom. The following types of problems can be found: dilution problems, Sucrose problem, Making Solutions from Solids, Metal Density problem, Liquid Density proble
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Quantitative Analysis
You can access the problems below via the Load Homework dialogue in the File menu of the Virtual Lab. They have been organized by concept and ranked by difficulty (A ranking of 1 denotes an easier problem; 5 is more challenging). Word files for these problems are provided so that you may edit and distribute the assignments in your classroom. The following types of problems can be found:Unknown Silver Chloride and Gravimetric Determination of Arsenic.
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Body With Thruster Model
The Body with Thruster Model shows the motion of a disk with an attached rocket engine. You can drag the engine to change its distance from the center of the disk and you can adjust the thrust of the rocket engine using sliders. The mass of the rocket and its connecting rod are assumed to be negligible. The trajectory of this single-body model is intuitively challenging and difficult to visualize.
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The Art of Interpretation: A.C.T.
SPARK goes backstage at the American Conservatory Theatre (ACT), as Artistic Director Carey Perloff takes on one of the 20th century's most important and challenging plays – Samuel Beckett's "Waiting for Godot." This Educator Guide explores Beckett's work and absurdism in literature.
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GEOLogic: Continental Drift and Plate Tectonics
GEOLogic questions are puzzles that were developed to support students understanding of geoscience concepts while challenging them to develop better logic and problem solving skills. In this exercise, students are asked to match up lecturers with what day and time they teach, and how many students they have in each class based on clues given from several different perspectives. In the second part of the activity, students are asked to learn more about the historic figures mentioned by doing read
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GEOLogic: How Much of the State is Wet
GEOLogic questions are puzzles that were developed to support students understanding of geoscience concepts while challenging them to develop better logic and problem solving skills. In this exercise, students are asked to match up students with their home state, and their states with the area and percentage of area of surface water that they contain, as well as where each of the states rank nationally in terms of water area. Students are given clues from various perspectives to help them deduce
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GEOLogic: How Well Do You Know Your National Parks and Memorials
GEOLogic questions are puzzles that were developed to support students understanding of geoscience concepts while challenging them to develop better logic and problem solving skills. Using a game show format, this exercise asks students to associate historical figures with a particular National Park or Memorial, as well as the number of points each student contestant scored on the show. This activity is appropriate for a high school science class or an introductory level undergraduate geoscience
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GEOLogic: Lagerstatten and Unique Fossils
GEOLogic questions are puzzles that were developed to support students understanding of geoscience concepts while challenging them to develop better logic and problem solving skills. In this exercise, students are asked to match up several unique fossils with the sites and locations where they were found, as well as their geologic age. This activity is appropriate for a high school science class or an introductory level undergraduate geoscience course, and can be given as an in-class assignment
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GEOLogic: Museums and their Dinosaur Displays
GEOLogic questions are puzzles that were developed to support students understanding of geoscience concepts while challenging them to develop better logic and problem solving skills. In this exercise, students are asked to match five top museums with two fossils that they have on display based on clues presented from various points of view. This activity is appropriate for a high school science class or an introductory level undergraduate geoscience course, and can be given as an in-class assign
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GEOLogic: Stream Discharge Rates - Rappahannock River Station
This webpage from SERC features GEOLogic questions, which are puzzles that were developed to support students understanding of geoscience concepts while challenging them to develop better logic and problem solving skills. In this example, students are asked to convert measurements in cubic feet per hour (cfh) to cubic feet per second (cfs) and then match up the names of the researchers measuring the flows at the river station with the correct flow rate. There is also a second part in which stude
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GEOLogic: State Fossils
GEOLogic questions are puzzles that were developed to support students understanding of geoscience concepts while challenging them to develop better logic and problem solving skills. In this exercise, students are asked to identify states with their state fossil and the year in which it was declared, based on clues given from various points of view. Learning goals, context for use, teaching tips, materials, assessment tips and related resources are provided.
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GEOLogic: The Big Five Mass Extinctions
GEOLogic questions are puzzles that were developed to support students understanding of geoscience concepts while challenging them to develop better logic and problem solving skills. In this exercise, students are asked to match up the five largest mass extinction events with their relative dates, approximate duration, and severity (percentage of species that became extinct) based on clues given from various perspectives. This activity is appropriate for a high school science class or an introdu
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GEOLogic: The Three Stooges and Their Pet Dinosaurs
GEOLogic questions are puzzles that were developed to support students understanding of geoscience concepts while challenging them to develop better logic and problem solving skills. In this exercise, students are asked to match up each of the Stooges with their favorite group and species of dinosaur based on clues given about which order and group each Stooge prefers. This activity is appropriate for a high school science class or an introductory level undergraduate geoscience course, and can b
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GEOLogic: Volcanologists
GEOLogic questions are puzzles that were developed to support students understanding of geoscience concepts while challenging them to develop better logic and problem solving skills. In this exercise, students are asked to resolve how many days each of five volcanologists spent at a given volcano and what day they started for the volcano. There is also a second part where students are asked to do some additional research about volcanoes on the web. This activity is appropriate for a high school
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5. An Unexpected Encounter (Upper Intermediate)
Here's what our VIP Subscriber Amanda has to say about this new Upper Intermediate Level Series: "I just love this new series. That's exactly what I needed. I can understand most of the Italian spoken on the series, and it is challenging enough to drive me on and keep me digging deeper into this [...]
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Pythagorean Theorem II
Video uses an electronic black board with different-colored pens.  Video shows more Pythagorean Theorem examples. Then goes into a problem where there is a right triangle and one angle that measures 45 degrees and one side of the triangle measures 5.  The problem is to solve for the other two sides.  Challenging problem for students to solve, video can be stopped and then restarted to get solution.
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Dealing With Controversial Issues
This program examines how social studies teachers in any grade level can encourage open and informed discussions with their students while dealing with controversial issues. Topics range from stereotypes and gender–based discrimination to the conflict in the Middle East. Through clearly identifying issues, listening to multiple perspectives, and formulating personal positions, teachers can explore a variety of
strategies that can be used to teach challenging issues such as these in thei

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Learning to Revise
For elementary-age children, revision is often new and challenging. This
program shows how teachers overcome students’ resistance to changing
their writing by providing concrete and effective revision strategies.

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Urban Unrest
While the 1960s saw young people "tune out" by way of the hippie counterculture, other segments of society were also calling for change. Both ethnic minorities and women were hard at work challenging what they saw as unjust laws and unfair treatment by society (Video is narrated with slides and speeches.)

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