Code.org Video Library - Tools and Videos; Inspire a student, resources by grade level
https://code.org/educate/resources/inspire

Begin with the Hour of Code

https://code.org/learn

Also Explore Beyond the Hour of Code - Links to tutorials with Tynker, Scratch, Lightbot, Hopscotch, JavaScript, Ruby, Python... tutorials for phones and tablets...links to programming robots including Tickle, Mindstorms, Arduino, Finch, Sphero, Dash & Dot, & Kibo
https://code.org/learn/beyond

Studio at Code.org

https://studio.code.org/
Try out the original Hour of Code with Classic Maze/Angry Birds or the Frozen, Star Wars, or Minecraft versions.
20 hour courses for beginners or try the Accelerated Course with leveled adaptations through 8th grade.
Courses include lesson plans and links to Common Core Math Standards. Signup for a free teacher account.

Other sources for hour of code Activities (many linked in the Studio.org section of Code.org as well)
Lightbot
https://lightbot.com/hour-of-code-2015-flash.html
Tynker
https://www.tynker.com/hour-of-code/
Khan Academy
https://www.khanacademy.org/hourofcode

Sources to learn about Python

Code Academy
https://www.codecademy.com/learn/python
Trinket
https://hourofpython.com/
Grok Learning (free Teacher account - student fee) - Middle School +
Use drag-and-drop blocks or the text-based language Python to draw flags from around the world, create fantastic snowflakes, or build a chatbot called "Eliza".
https://groklearning.com/hoc-2015/
Code Combat - Middle School +
Defeat ogres to learn Python or JavaScript in this epic programming game!
https://codecombat.com/play
Codesters - Age 12-14
Create your own games, animations, and artwork using Python. Once you’re done, share them with friends! Program in Python, a real programming language used every day at companies - our drag and drop toolkit makes it easy to learn! Try building a basketball game, choreographing a dance, or designing an animated card!
https://www.codesters.com/HoC/