While it seems that there are fewer free classes on the calendar, free Arduino and Electronics classes are springing up to fill the void. The following classes are free, open to non-members, beginner to intermediate level and all parts are furnished except your laptop. Classes are small and fill quickly so check back often if they show full.
@NickWebb teaches what has been the most popular Arduino class for the last two years. You will learn to build circuits on a breadboard using a temperature sensor, light sensor, servo and other components. Programs will be provided to control these parts.
Arduino: Sensors for Fun and Non Profit!
@Dale_Wheat has been rolling out a variety of classes. All these have just been listed and have seats available. They are scheduled for this coming Saturday so register quickly.
Learn To Solder
Basic Electronic Applications: Fun with 555s
Charlieplexing LEDs with Arduino
Communicating between Arduinos can be a challenge for beginners. I will be repeating a class using simple, cheap NRF24L01 modules to do point to point communications between an array of Arduinos.
Arduino: Wireless Communication with the NRF24L01 Transceiver
ThingSpeak is an Internet of Things service that offers free hobby level services to archive and display eight data points every fifteen seconds with a maximum of three million messages a year. In my newest class, you will build a temperature sensor and broadcast it to the cloud and display results in a browser.
Arduino: ThingSpeak into the Internet of Things!