The periodic table:

• Periodic Table Fun:  If you can’t tell an alkali metal from an alkaline earth metal, this worksheet can help! 
• Oxidation States and Charges in Ionic Compounds:  I know you probably haven’t started talking about ionic compounds yet.  However, this will greatly enhance your knowledge of the periodic table!
• Groups of the periodic table:  The best table in the world, except for the one at Sizzler where they’ve got that all-you-can-eat buffet.  Man, I could go for some Sizzler right now.
• Periodic Trends:  Electronegativity!  Atomic radius!  Ionization energy!  Awesome!

Updated 3-30-16