These are included in a GROWING bundle that will include ALL 8th Grade Math Common Core Standards. Check it out here:
8th Grade Growing Task Card Bundle
20 Task Cards dedicated to 8.EE.A.3 Write very large or very small quantities in Scientific Notation.
The first 10 cards have students converting from Standard Form to Scientific Notation. The next set of 10 cards has students convert from Scientific Notation to Standard Form.
Student Recording Sheet Included.