Core Skills Analysis
Science (Physics/Electrical)
The student wired miniature vehicles by connecting batteries, switches, and motors, and observed how electricity traveled through the circuit to make the wheels turn. They identified conductors and insulators, distinguished between series and parallel connections, and explained how voltage, current, and resistance interact to control speed. By troubleshooting why a vehicle wouldn’t move, they practiced systematic observation and hypothesis testing, reinforcing core concepts of electric circuits.
Mathematics
The student measured the voltage of each battery and the current drawn by the motor, then used Ohm’s Law (V=IR) to calculate the resistance of the wiring and any added components. They recorded the data in a table, plotted speed versus voltage on a graph, and interpreted the slope to understand how increased voltage affected vehicle performance. This activity reinforced proportional reasoning, unit conversion, and basic data analysis skills.
Engineering/Technology
The student followed the engineering design process: they defined the problem (make a vehicle move), brainstormed wiring layouts, created a prototype, tested its function, and iterated on the design to improve speed and stability. They selected appropriate materials, integrated mechanical and electrical subsystems, and documented their design decisions, thereby gaining hands‑on experience in interdisciplinary engineering.
Tips
To deepen learning, have the student build a speed‑control circuit using a potentiometer and compare its effect to a simple on/off switch. Next, challenge them to design a multi‑vehicle race track where each car must complete a circuit that lights an LED at the finish line, integrating coding with a microcontroller like Arduino. Finally, organize a mini‑exhibit where the student explains the science and math behind their wired vehicles to family members, practicing communication skills and reinforcing conceptual understanding.
Book Recommendations
- The Way Things Work by David Macaulay: A visual guide that explains the mechanics and physics behind everyday machines, including detailed sections on electricity and simple motors.
- Make: Electronics by Charles Platt: A hands‑on project book that walks teens through building circuits, troubleshooting, and creating functional electronic devices.
- The Boy Who Harnessed the Wind by William Kamkwamba: A true‑story memoir of a teenager who built a wind turbine from scrap parts, inspiring young engineers to solve real‑world problems with limited resources.
Learning Standards
- NGSS MS-PS2-3: Apply forces and motion concepts to design a device that moves (wired vehicle).
- NGSS MS-PS3-2: Use mathematical representations to describe the relationship between energy, work, and power in the circuit.
- NGSS MS-ETS1-2: Evaluate alternative designs based on criteria such as speed, reliability, and cost.
- CCSS.MATH.CONTENT.HSN.Q.A.1: Use units to describe quantities (volts, amperes, ohms).
- CCSS.MATH.CONTENT.HSN.RN.B.3: Reason about the relationships among quantities in linear functions (speed vs. voltage graph).
Try This Next
- Worksheet: Circuit diagram template where students label series vs. parallel sections and calculate total resistance.
- Quiz: 10‑question multiple‑choice test on Ohm’s Law, voltage sources, and safety symbols.
- Design Challenge: Create a poster that maps the engineering design steps used, including sketches of each prototype iteration.
- Reflection Prompt: Write a brief report describing a failure in the circuit, the hypothesis for why it happened, and the steps taken to fix it.