I was asked about our time-lines.  So here are a few different styles that I use frequently.  The first is my favorite for history.

These are just a chronological order of events for the American Revolution.  I got the time-line pieces from Hold That Thought.  I simple used card-stock and put them in protective sleeves.  As for the years on each page, it depends on how much information I have for each year.  I also like to color the rim of the pictures according to the kind of event it was.  This is just done according to my personal taste, it may not make sense to someone else. LOL 

Now for Science I like to use the accordion fold.  Here are a few pictures of the Chemistry one.  The first one is of it all folded up.

Then here it is all stretched out, showing the front side.

This is the backside.

I make these by cutting some card stock into strips.  I then fold the strips in half and glue together.  If you look at the pictures you can see the other colors from the backside.  It's one half glued onto one half of another paper.  It is actually pretty sturdy this way.  On this particular one there was different kinds of achievements made in chemistry.  So I use different colored sharpies for each kind.  As you can see some parts are more crowded than others.  I can't say we make the neatest time-lines but they do show us what happened when.  Sometimes we add clipart to these also.  This particular one is rather boring.

There you have it.  A sampling of how we do timelines.  I've seen some pretty elaborate ones and I think, boy ours sure don't compare.  Then again ours works for us and that is all that matters.  My best advice is to just play around with them until you find what works for you.  As long as you got the dates in the right order, you pretty much can't go wrong.