Yeah, I don't understand Daylight Savings Time either...

...but this cool interactive site helped a lot! This activity from WebExhibits (describing themselves as an interactive online museum) is set up as a series of "nodes"--little category clouds that, when clicked, lead you to subcategories. It's full-on text, though relatively minimal, so it would probably be best used with older students.

Language Lens

• This site seems like it was designed for SLPs, with an overall schema-based organization and clear sense of categories. Try picking one topic (e.g. "Reasons why we have DST") and using a graphic organizer to map it as a list. Mindwing's Thememaker product is one way to do this.