electronics basicsWhat Does a Multimeter Measure?
A beginner-friendly guide to what a multimeter measures in classroom circuits: voltage, resistance, current, and continuity.
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Teaching notes, project walkthroughs, and hands-on electronics guides from Gary and the Mr Circuit team.
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Updated Jul 22, 2026
componentsReading the Resistor Color Code Without Memorizing
Read four- and five-band resistor color codes with a simple pattern, worked examples, tolerance ranges, and a safe multimeter verification routine.
circuitsOhm's Law in One Class Period: A Teacher's Walkthrough
Teach Ohm's law in one 45-minute class with a low-voltage circuit, prediction and measurement table, LED resistor example, and exit ticket.
multimeterWhy Students Should Predict Before They Measure
Learn why students should predict before they measure in STEM labs and how a simple prediction routine improves circuit reasoning, safety, and...
curriculumOhm's Law in One Class Period: A Teacher's Walkthrough
Ohm's Law, series, parallel, LED voltage drops, and picking the right resistor — taught the way Lab 1201 sequences it, in a...