In first grade, children are introduced to fractions. Here's a recipe that combines fraction practice with winter fun and lets kids actually paint the snow!
You don't need to head to the Arctic to experiment with life in an igloo. Kids can build their own ice igloo at home from water and empty milk containers.
Introduce your fourth grader to the concepts of solstices by observing the length of her shadow on the shortest day of the year, compared to other solstices.