Interface devices consisting of analog and digital ports, internal memory, built-in programs for graphing calculators, used with external and internal components to collect, analyze, and graph measurements of temperature, barometric pressure, magnetic fields, ph levels, flow rate, acceleration, gas pressure, force, dissolved oxygen, electrode amplification, chloride ion, ammonium ion, calcium ion, nitrate ion, oxidization and reduction, oxygen gas, light, ultraviolet light, voltage, current, conductivity, electronic charge, humidity, soil moisture, electrocardiograph level, sound level, voltage amplification, salinity, turbidity, grip strength, air flow, lung volume, respiration, heart rate, and other scientific data, which can be connected to a computer, graphing calculator, or personal digital assistant, or used as a stand-alone device, for use in elementary school, junior high school, high school, and college science and math laboratories and classrooms

Computer hardware comprised of sensors, namely, accelerometers, gas sensors, colorimeter, conductivity probes, current and voltage probes, dissolved oxygen probes, force sensors, EKG sensors, exercise heart-rate monitors, temperature probes, flow rate sensors, gas pressure sensors, instrumentation amplifiers, ammonium ion-selective electrodes, calcium ion-selective electrodes, chloride ion-selective electrodes, nitrate ion-selective electrodes, light sensors, magnetic field sensors, microphones, motion detectors, ph-level sensors, radiation monitors, relative humidity sensors, respiration monitor belts, rotary motion sensors, student radiation monitor, turbidity sensors, thermocouplers, voltage probes, water depth sampler, and related computer interface boards for use in junior high school and high school science classrooms