Appliance Electricity Investigation is an openly licensed classroom activity for learners to estimate, measure, and compare the electricity use and cost of plug-in appliances. Students use visible kWh and cost formulas, appliance nameplate values or a compatible plug-in electricity meter, their own usage schedules, and a local electricity rate.

The accessible HTML activity includes learning objectives, safety guidance, a blank worksheet, five transparent worked examples, comparison and reflection questions, and facilitator notes. A printable PDF and versioned CSV/JSON example data are included. Supplied values and rates are replaceable examples; actual consumption varies by appliance, settings, condition, and use.

The resource is free, requires no account, and is licensed CC BY 4.0. It was created for Appliance Cost Lab with AI assistance for drafting and coding, followed by human review, editing, calculation checks, accessibility testing, and publication verification.