Lessons you can teach tomorrow.
Each lesson fits one class period and plays in your browser. Put it on the projector, step through the scenes, and send your students to the simulation. Everything is free. There is no form and nothing to download.
Follows the 2026 NEC · Section numbers only, no code text · Free
In the order a course teaches them
Box fill314.16, 314.16(A), 314.16(B)(1), 314.16(B)(2)Play the lesson
GFCI and AFCI210.8, 210.8(A), 210.8(B), 210.8(C)Play the lesson
Wire sizing310.16, 310.15(A), 310.15(C)(1), 110.14(C)Play the lesson
Rough-in210.52(A)(1), 210.52(A)(2), 210.52(A)(3), 210.52(C)(1)Play the lesson
Three-way switches406.30(A), 406.30(B), 406.30(C), 200.8(C)(1)Play the lesson
Load calculation120.5(C), 120.41, 210.11(C)(1), 120.52(A)Play the lesson
Voltage drop210.19, 215.4(A)(2), 90.5(C), 647.5(D)Play the lesson
Grounding and bonding250.4(A)(1), 250.4(A)(3), 250.4(A)(5)(a), 250.4(A)(5)(b)Play the lesson
Conduit fill300.19(A), 358.22, Annex C, Table C.1Play the lesson
Conduit bending358.24(A), 358.24(B), 344.24, 352.24Play the lesson
Questions about the lessons
What are the Ask Shorty lessons?
They are 10 free lessons on the 2026 NEC for electrical instructors. Each one fits a single class period and plays in your browser, with the section number behind every rule.
Do the lessons cost anything or need an account?
They are free. There is no account.
What does each lesson include?
Scenes you step through on a projector. Most lessons have living visuals you can change while you talk. Every lesson has a simulation your students play. Below the lesson you get a class plan by minutes, the section numbers, quiz questions with answers, and the mistakes to watch for.
Which classes are the lessons written for?
Each lesson names its level, first-year or second-year apprentices, and runs about 50 minutes. They are listed in the order a course teaches them, and you can teach them in any order.
Can I change a lesson?
Yes. In a lesson with more than one scene, choose Arrange to hide scenes or change their order. The link in your address bar keeps your order, so you can save it or share it.