Every four years something funny happens with our calendars -- we add a day! Why do we do this? Discover the science behind leap year.

This science vocabulary activity is packed with basic science vocabulary words to help the youngest kids warm up to scientific concepts.

Let your scientific skills shine as you decide which objects will let light pass through in this kindergarten and first-grade worksheet!

Here is a brief introduction to The Great Pacific Garbage Patch for kids!

For each item on this first grade science worksheet, kids match a piece of clothing with the thermometer showing a temperature for wearing the item of clothing.