This interactive Java applet game has a user adding positive and negative ...

This interactive Java applet game has a user adding positive and negative integers to arrive at a sum of zero. Seven overlapping circles form a ring similar to a Venn diagram. Five blue numbers are in position when the game begins. The remaining nine numbers (from -6 through 7) must be placed in the empty spaces to produce a sum of zero in each circle. There is a unique solution for each puzzle. Instructions for users and teacher information are available through links at the top of the page.

This short, time-lapse video shows the changes in the Columbia Glacier from ...

This short, time-lapse video shows the changes in the Columbia Glacier from May 12, 2007 to August 20, 2010. Narration provides general description of the geophysical dynamics and processes.

A video from the Extreme Ice Survey in which Dr. Tad Pfeffer ...

A video from the Extreme Ice Survey in which Dr. Tad Pfeffer and photographer Jim Balog discuss the dynamics of the Columbia glacier's retreat in recent years through this time-lapse movie. Key point: glacier size is being reduced not just by glacial melting but due to a shift in glacial dynamics brought on by climate change.

There is a non-mathematical fact that students must know about mixtures in ...

There is a non-mathematical fact that students must know about mixtures in order to answer this question. When salt is dissolved in water, the salt disperses evenly through the mixture, so any sample from the mixture that has the same volume will have the same amount of salt.

This is a task from the Illustrative Mathematics website that is one ...

This is a task from the Illustrative Mathematics website that is one part of a complete illustration of the standard to which it is aligned. Each task has at least one solution and some commentary that addresses important aspects of the task and its potential use.

This is an activity about structures in space. Learners will construct two ...

This is an activity about structures in space. Learners will construct two different types of trusses to develop an understanding of engineering design for truss structures and the role of shapes in the strength of structures. For optimum completion - this activity should span 3 class periods to allow the glue on the structures to dry. This is engineering activity 1 of 2 found in the ISS L.A.B.S. Educator Resource Guide.

This is an activity associated with activities during Solar Week, a twice-yearly ...

This is an activity associated with activities during Solar Week, a twice-yearly event in March and October during which classrooms are able to interact with scientists studying the Sun. Outside of Solar Week, information, activities, and resources are archived and available online at any time. Learners will use SOHO spacecraft images of a coronal mass ejection and tracing paper to measure and then calculate the speed of the coronal mass ejection. This activity is scheduled to occur during Wednesday of Solar Week.

In this activity, learners prepare four polymer elastomers and then compare their ...

In this activity, learners prepare four polymer elastomers and then compare their physical properties, such as texture, color, size, and bounce height. This activity is a fun way for learners to become more familiar with polymers and their uses. Safety note: The "Teacher Notes for Level 1" link contains a number of safety guidelines that should be read before doing this activity.

A Physlet-based simulation demonstrating how the eye perceives size. Two distant light ...

A Physlet-based simulation demonstrating how the eye perceives size. Two distant light sources are shown. The user can move the sources without changing their distance from the eye. The effect of the motion on the image on the retina is shown.

This activity is geared for sixth graders as they are first introduced ...

This activity is geared for sixth graders as they are first introduced to the relevance of taxonomy and the Linnaean system of classification, along with the concept of Domains. It is part 1 of 3 lessons.

This lesson is the first of two-part series on cells. In Cells ...

This lesson is the first of two-part series on cells. In Cells 1: Make a Model Cell, students will compare a plant and animal cell and then make a model of a cell. They will select items to represent various cell structures and justify their choices by describing how the items they have chosen represent the actual parts of a cell. Prior to this lesson, students should have at least been introduced to cells, including the basic differences between plant and animal cells.

The three tasks in this set are not examples of tasks asking ...

The three tasks in this set are not examples of tasks asking students to compute using the standard algorithms for multiplication and division because most people know what those kinds of problems look like. Instead, these tasks show what kinds of reasoning and estimation strategies students need to develop in order to support their algorithmic computations.

This is the first and most basic problem in a series of ...

This is the first and most basic problem in a series of seven problems, all set in the context of a classroom election. Every problem requires students to understand what ratios are and apply them in a context. The problems build in complexity and can be used to highlight the multiple ways that one can reason about a context involving ratios.

This interactive Java learning tool allows a teacher to demonstrate and explore ...

This interactive Java learning tool allows a teacher to demonstrate and explore the distributive property with expressions in the factored form (a + b) (c + d) using a matrix multiplication method with students. Sliders determine the number values from 20 to -20 with increments of one-tenth. Check boxes show or hide the factored form, starting matrix values, matrix, products in the matrix, and solution.

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