Teachers, have you made your summer/fall plans yet? If not, you may want to consider this offer. Our friends at Lindblad-National Geographic are inviting C&NN Natural Teachers to join them on a world class expedition to the Galapagos. And they have announced a 2-for-1 offer for teachers to travel on a 10-day Galapagos trip in summer or fall, 2011. Here are all the details of the 2-for-1 teacher offer. There are also links to a video preview of the expedition and quarters, as well as photos and video from other nature expeditions around the globe.