6th Grade-PERIODIC TABLE of the ELEMENTS
Check out this interactive Periodic Table of the Elements - http://www.rsc.org/periodic-table OR this one http://periodictable.com/ 
 Start here - http://www.chem4kids.com/files/matter_intro.html to learn about matter.  Chem For Kids
 Chem For Kids        
                                                                                                                              
 And after you learn all about matter and atoms, find out more about the Periodic Table of the Elements - http://www.chem4kids.com/files/elem_intro.html
Chem For Kids  
Time Magazine LEARN ALL ABOUT
THE ELEMENTS HERE