This resource is part of Tools4NCTeachers.

Students are asked to solve a real world problem, show their work using pictures, numbers or words, and record a matching equation. The task may be used for instructional or assessment purposes.

This resource is part of Tools4NCTeachers.

This file contains strategies and representations for subtraction problems within 20. The images in this file help teachers better understand ways to record strategies on the board and/or anchor charts.

This resource is part of Tools4NCTeachers.

In this lesson, students begin to move beyond counting as a strategy for solving addition and subtraction problems. They will use what they know about numbers and relationships between numbers to add and subtract with other strategies. Students will start to see connections between strategies to help them transition their thinking.

Individual Assessment: Using what you’ve learned so far, come up with a model to explain this new phenomenon. Be sure to include all key components and interactions from your “Gotta Have It” checklist.

What sort of measurements would someone need to take to determine if one bird behaves differently (more bold) around people than another bird?

Follow all procedures to develop a working model for the juncos behavior being learned or inherited. This lesson has several readings for guidance on protocol.

Use this worksheet to help you prepare to build a comprehensive model of all of the structures and processes involved in reducing the negative impacts of human activity on climate.

Using a computational model to make predictions will be examined in this activity.

The airplanes unit begins with a lesson on how airplanes create lift, which involves a discussion of air pressure and how wings use Bernoulli's principle to change air pressure. Next, students explore the other three forces acting on airplanes thrust, weight and drag. Following these lessons, students learn how airplanes are controlled and use paper airplanes to demonstrate these principles. The final lessons addresses societal and technological impacts that airplanes have had on our world. Students learn about different kinds of airplanes and then design and build their own balsa wood airplanes based on what they have learned.

Students use thermometers as a model to demonstrate the movement of molecules as they are heated and cooled.

Students learn about homeostasis and create models by constructing simple feedback systems using Arduino boards, temperature sensors, LEDs and Arduino code. Starting with pre-written code, students instruct LEDs to activate in response to the sensor detecting a certain temperature range. They determine appropriate temperature ranges and alter the code accordingly. When the temperature range is exceeded, a fan is engaged in order to achieve a cooling effect. In this way, the principle of homeostasis is demonstrated. To conclude, students write summary paragraphs relating their models to biological homeostasis.

Students learn the history of the waterwheel and common uses for water turbines today. They explore kinetic energy by creating their own experimental waterwheel from a two-liter plastic bottle. They investigate the transformations of energy involved in turning the blades of a hydro-turbine into work, and experiment with how weight affects the rotational rate of the waterwheel. Students also discuss and explore the characteristics of hydroelectric plants.

Students learn about physical models of groundwater and how environmental engineers determine possible sites for drinking water wells. During the activity, students create their own groundwater well models using coffee cans and wire screening. They add red food coloring to their models to see how pollutants can migrate through the groundwater into a drinking water resource.

Students reinforce an antenna tower made from foam insulation so that it can withstand a 480 N-cm bending moment (torque) and a 280 N-cm twisting moment (torque) with minimal deflection. During one class period, students discuss the problem, run the initial bending and torsion tests and graph the results. During the following class periods, students design, construct and test sturdier towers, and graph the results.