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