Social Studies lost its spark? How about some online games? There are games on all kinds of subject like Ben Franklin, US Presidents even Women in history.
Have a themed dinner. Make food from the time you are learning about. Example: Medieval Times - set the table the way a king or knight might set his table. Eat food that would have been served at that time. Eat w/ your fingers! (kids love that) Drink from goblet (wine glasses) the list goes on.
Play games the kids from that time played. Example: If you were learning about the Vikings you could play dice games or board games.
Go to a Museum that has a display about what you are learning on. But make it even more interesting let your child take pictures at the museum. Then create a scrapbook out of the pictures he/she took. With details on what the pictures where.
Here was my son's first attempt at taking pictures at a museum. It was a little fuzzy but he took pictures about a new age printing system.
Watch for more ideas on how to keep the "SPARK" in your homeschool day.