If you are looking for a formal electronics course, here it is…free. Lessons in Electric Circuits by Tony R. Kuphaldt is a six-volume course suitable for high school or college credit.
Volume I covers basic DC electric circuit concepts and components.
Volume II begins AC circuits including filters, transformers, and motors.
Volume III covers semiconductors and solid state devices (portions of this volume are not currently complete).
Volume IV focuses on digital computing — logic gates, switches and digital communication.
Volume V includes helpful reference materials.
Volume VI contains the lab experiments for the other volumes.
This is a excellent resource for those budding electrical engineers who are ready to teach themselves.
Elenco 500-in-One Electronic Project Lab
If you are willing to invest in an electronics lab that will fit a high school student from DC to AC to programmable devices, you may be interested in this kit from Elenco. No soldering; all of the components are included. You can view the table of contents and a sample from the manufacturer.