For Mac OS users, there is a system setting that may not allow you to tab onto several types of elements in a web page. To change this setting:
This brief video explains what the transition to the CCSS means for California. This video was developed by the Californians Dedicated to Education Foundation in collaboration with the California Department of Education, the State Board of Education, California County Superintendents Educational Services Association, California State PTA®, California School Boards Association, California Teachers Association, California Federation of Teachers AFT/AFL-CIO, Association of California School Administrators, and the Los Angeles Chamber of Commerce.