Arduino Development for OSX and iOS (2015)

2. Sketch Programming

2.8 What's Next?

To get more practices, I recommend you to try several sensor and actuactor devices to be attached on Arduino board. There are many sensor kits that you can buy on local electronics store or online store such as eBay, Banggood, http://www.banggood.com/37-In-1-Sensor-Module-Board-Set-Kit-For-Arduino-p-89734.html .