Products

1478
EM-8624A
CASTLE Kit

CASTLE Kit

EM-8624A   - 

Leads students from initial naive ideas to an increasingly expert understanding of electrical phenomena. Kit for two students.

Also Available:

50680
EM-8654
Economy CASTLE Kit

Economy CASTLE Kit

EM-8654   - 

Leads students from initial naive ideas to an increasingly expert understanding of electrical phenomena. Kit for eight students.

Overview

The CASTLE™ Approach

CASTLE (Capacitor-Aided System for Teaching and Learning Electricity) is a high school electricity curriculum that leads students from initial naive ideas to an increasingly expert understanding of electrical phenomena. A sequence of self-guided experiments uses large capacitors and transient bulb lighting to help students confront their misconceptions, grasp the physics of current propulsion and build intuitive explanatory models.

The core experiments stimulate students to model mobile charge as a compressible fluid and electric potential as "pressure" in the fluid. They learn that a pressure difference is what makes charge move through a resistor. The advanced experiments reveal two kinds of charge and distant action, which suggests modeling fields as pressure raising/lowering "halos" around ± charges. Connections between the electron, the atom and mobile charge in circuits are also explored.

CASTLE instruction gives priority to development of qualitative reasoning skills. No prior knowledge of electricity is required, making the curriculum accessible to students in all levels of high school physics. And sections have been redesigned to facilitate beginning the CASTLE curriculum in 8th or 9th grade.

Special Features

  • 25,000 µF Capacitor -- Provides the foundation for this intuitive introduction to current electricity.
  • Wires with Alligator Clips -- Ten color-differentiated wires make circuit connections quick and easy -- no soldering or wire twisting.
  • Battery Holder -- Securely holds batteries and yet makes them very visible so that their function within the circuit is evident.
  • Miniature Light Bulbs -- Differently shaped bulbs have different resistance values.
  • Curriculum Guide Download (pdf) -- Contains a teacher's manual (pdf) with comprehensive background information and a student manual (pdf) for printing and distributing in class. Sections may be printed individually as needed.

Includes

  CASTLE Kit
EM-8624A
Economy CASTLE Kit
EM-8654
25,000 µF capacitor (20 volts, nonpolar) (4)
#14 light bulbs (4) (25)
#48 light bulbs (6) (25)
10 Ohm Resistors (4) (16)
Miniature light bulb sockets and stands (4) (16)
Wires with alligator clips (10) (40)
Battery holder (spring-loaded) (4)
High quality compass (4)
Storage box

How It Works

The CASTLE approach originated in the research of Professor Melvin S. Steinberg of Smith College. The complete curriculum was developed by a team of college and high school physics teachers under a National Science Foundation grant. Extensive testing has shown superior conceptual and confidence gains. In 1994, CASTLE was certified a proven effective program by the U.S. Department of Education's Program Effectiveness Panel.

In addition, the AAPT PTRA group has adopted CASTLE as has the C3P group and the Modeling Group demonstrating that CASTLE is being chosen by the leaders of physics education as the preferred method for teaching electricity.

Experiments

Core Curriculum

  • What is happening in the wires?
  • Where does the moving charge originate?
  • What do the light bulbs do?
  • What makes the charge move?
  • How is the "pressure" in a wire determined?
  • How are values of circuit variables measured?

Advanced Curriculum

  • How do motors and generators work?
  • Do insulators contain charge? What are electrons?
  • What causes "pressure" in distant conductors?
  • How do transistors work? What is AC?

Replacement Parts

1831
EM-8627
Light Bulbs (#14, 25 Pack)
EM-8624A,EM-8654,EM-8656,EM-8630,EM-8624A
1
1835
EM-8628
Light Bulbs (#48, 25 Pack)
EM-8624A,EM-8654
1
50485
EM-8630
Light Bulb Sockets (10 Pack)
EM-8624A,EM-8654
1
50486
EM-8631A
Liquid-Filled Compasses (5 Pack)
EM-8624A,EM-8654,EM-8624A,EM-8654
1
50487
EM-8632
Capacitor (0.025 F, 2 Pack)
EM-8624A,EM-8654,EM-8654,EM-8624A
1
Product Name Part Number Price Qty. Select
Light Bulbs (#14, 25 Pack)   EM-8627 Get Quote
Light Bulbs (#48, 25 Pack)   EM-8628 Get Quote
Light Bulb Sockets (10 Pack)   EM-8630 Get Quote
Liquid-Filled Compasses (5 Pack)   EM-8631A Get Quote
Capacitor (0.025 F, 2 Pack)   EM-8632 Get Quote

Buying Guide

CASTLE Kit

(EM-8624A)

Economy CASTLE Kit

(EM-8654)

Resources

CASTLE Kit (EM-8624A)

Product Manuals

CASTLE Kit (EM-8624A)

MSDS

Economy CASTLE Kit (EM-8654)

Product Manuals

Economy CASTLE Kit (EM-8654)

MSDS

Replacement Photodiode (AP-8207)