Uni of Texas is doing a free embedded system course based around a TI ARM processor board
https://www.edx.org/course/utaustin/ut-6-01x/embedded-systems-shape-world/1172
Although this is not on the AVR microcontroller chip used in Arduino/Moteino but it is still useful for many users interested in tinkering with microcontroller and ARM based chips are used in many other small system like Raspberry Pi.