For a bit of everything... Again, articles are not always comprehensive, but they may serve as good conversations-starters! A very detailed search menu is helpful to find something relevant for your class discussion topic.
One more article about 10 "classic psychology experiments" and what we can learn from them . Many of these have been discussed in previous threads with regards to ethics. This is not a very "academic" article but some of the short discussions can serve as great introductions to further class talks.