Students learn how different characteristics of shapes—side lengths, perimeter and area—change when the shapes are scaled, either enlarged or reduced. Student pairs conduct a “scaling investigation” to measure and calculate shape dimensions (rectangle, quarter circle, triangle; lengths, perimeters, areas) from a bedroom floorplan provided at three scales. They analyze their data to notice the mathematical relationships that hold true during the scaling process. They see how this can be useful in real-world situations like when engineers design wearable or implantable biosensors. This prepares students for the associated activity in which they use this knowledge to help them reduce or enlarge their drawings as part of the process of designing their own wearables products. Pre/post-activity quizzes, a worksheet and wrap-up concepts handout are provided.

SciGirls has the bold goal of changing how millions of girls think about science, technology, engineering and math -- or STEM. Each half-hour episode highlights the processes of science and engineering, following a different group of middle school girls who design, with the help of scientist mentors, their own inquiry-based investigations on a variety of topics. They also learn how rewarding and fun it is to work with their peers, and the shows' female mentors offer girls a glimpse of exciting STEM career possibilities. In This Collection: Video (242), Document (59) for Grades 3-5, 6-8, 9-12 , Resources in Spanish (278)

SciGirls has the bold goal of changing how millions of girls think about science, technology, engineering and math - or STEM. Each half-hour episode highlights the processes of science and engineering, following a different group of middle school girls who design, with the help of scientist mentors, their own inquiry-based investigations on a variety of topics. They also learn how rewarding and fun it is to work with their peers, and the shows' female mentors offer girls a glimpse of exciting STEM career possibilities. SciGirls educational materials provide gender-equitable teaching strategies and hands-on inquiries based on the concepts modeled in SciGirls' videos. Included in this collection: Video (240), Document (59) for Grades 3-5, 6-8, 9-12 , Resources in Spanish (276).

Science NetLinks is a premier K-12 science education resource produced by the American Association for the Advancement of Science. At Science NetLinks, you'll find teaching tools, interactives, podcasts, and hands-on activities, and all of it is free!

Science NetLinks provides K-12 teachers, students, and families with quality resources for teaching and learning science.

All of the resources are Internet based and free to everyone. Lessons and activities can be printed or used online. Many of the interactives, esheets, and tools work great on an interactive white board or in a computer lab. All of the resources are designed to be delivered in a variety of formats and classroom settings.

Science NetLinks' role is to provide a wealth of standards-aligned resources for K-12 science educators, including lesson plans, interactives and reviewed Internet resources. Science NetLinks is a dynamic site with new content being added on a regular basis, so check back often

Demonstrates how to use a simulation with random number tables to find the probability that someone will win a prize in a cereal box contest. [9:46]

Skittles - yum!! You will instantly have your student's attention when you teach about arrays using Skittles. This detailed lesson walks you through the steps, provides worksheets for varying math levels, and includes a video of the lesson in action.

Explore the relationship between slope and the constant rate of change for linear functions. Assess learning with a quiz. [3:42]

Students first learn a strategy for solving unit rate problems, then they use grocery store ads to calculate unit rates and compare prices. [1:54]

In this lesson, students will be shown how to solve a Pythagorean identity for cosine. It is 4 of 8 in the series titled "Solving a Pythagorean Identity for Cosine." [1:30]

In this lesson, students will be shown how to solve a Pythagorean identity for cosine. It is 6 of 8 in the series titled "Solving a Pythagorean Identity for Cosine." [2:25]

This lesson demonstrates how to solve a Pythagorean identity for sine. It is 2 of 7 in the series titled "Solving a Pythagorean Identity for Sine." [1:54]

This lesson demonstrates how to solve a Pythagorean identity for sine. It is 3 of 7 in the series titled "Solving a Pythagorean Identity for Sine." [2:24]

This lesson shows how the Pythagorean Identity can be solved for the tangent function. It is 1 of 6 in the series titled "Solving a Pythagorean Identity for Tangent." [3:24]

This lesson shows how the Pythagorean Identity can be solved for the tangent function. It is 3 of 6 in the series titled "Solving a Pythagorean Identity for Tangent." [3:10]

This lesson shows how the Pythagorean Identity can be solved for the tangent function. It is 5 of 6 in the series titled "Solving a Pythagorean Identity for Tangent." [1:56]

Various listening examples of native speakers in different dialects doing simple math problems. Provides a transcript as well so you can read along.

Students learn about the special product rule for Product of the Sum and Difference of Two Terms, which is useful for understanding polynomial identities. Includes short multiple-choice quiz. [3:30]

Students analyze and begin to design a pyramid. Working in engineering teams, they perform calculations to determine the area of the pyramid base, stone block volumes, and the number of blocks required for their pyramid base. They make a scaled drawing of the pyramid using graph paper.

Looks at the types of questions that statistics can address and explains how to tell the difference between a statistical and a non-statistical question. [7:50]

Khan Academy learning modules include a Community space where users can ask questions and seek help from community members. Educators should consult with their Technology administrators to determine the use of Khan Academy learning modules in their classroom. Please review materials from external sites before sharing with students.

Most bears are getting ready to hibernate this time of year. NOT IN MY ROOM! These little brown bears will be on the hunt for shapes they see.