I disagree. You are effectively saying elementary school teaching activities do not change and are the same now as compared to 20, 30 years ago. I admit there m

I disagree. You are effectively saying elementary school teaching activities do not change and are the same now as compared to 20, 30 years ago. I admit there might be some valid cases of "evergreen" articles, but I would argue that for these cases, showing the date will not take away anything from the article. Readers are smart, trust them to put the date in the proper context rather than hide it from them.