With a major hurricane hitting Louisiana today and another forming and set to hit the US this week, I have chosen to study weather, particularly storms, this week.
If you live in an area that receives rain fall this week, put out containers to measure the rain fall.
Graph the weather this week. You can use bar graphs for weather type (sunny, cloudy, rainy, etc) and/or line graphs for temperature and rainfall.
Check the temperature a few times throughout the day or day to day and have the child figure out the temperature difference.
Watch the clouds and find ones that resemble certain shapes. A fun book to go with this is It Looked Like Spilt Milk by Charles G Shaw. You can turn this into a lesson on cloud types (cumulus, Cirrus, stratus, etc) as well.
If you are interested in introducing percentages, have the child watch the weather on the news each day and note when the weather person is correct in their forecast (probably easiest if they follow one aspect of prediction such as rain or no rain). At the end of the week, or 5 days which would be easiest, have them figure out the percentage of times the weather person was correct.