I grew up in the United States. I have a vivid memory of learning the words for clouds (e.g., cumulus, stratus, cirrus, etc) at the age of six in the first gra

I grew up in the United States. I have a vivid memory of learning the words for clouds (e.g., cumulus, stratus, cirrus, etc) at the age of six in the first grade. We didn't need to able to spell them, but we had to be able to identify them by matching pictures of the clouds with the words.