For those who get stuck, remember that you get insane value from the long range of kids/laborers, and that fields are useful storage for your kids/laborers so they're not spread out like crazy and you can keep track of them; so just spam field-house-tree-house-field, field-house-tree-house-field, and carry the kids you generate with you (you can put them down on a field and pick them up as you need them, as either a kid with reduced forward range to carry forward to the next field, or a laborer with full range, depending on how you pick them up). At a certain point, start using only the laborers to collect wood for the houses, and save the kids for producing the fields. Eventually you get to a point where you have 6 full range kids, ten or so laborers/kids with reduced range, and the seed parked right on top of your last field-house-tree-house-field, and the furthest forward house will have two empty slots you can route electricity to for the two students you need to complete the game. After you have that, you're set: just propagate the tree forward 5 times at max range (the range of kids/laborers/students/cows is about 5 trees) (also, in order to truly get maximum range out of the trees, take a kid with you to plant fields/pastures to push forward the fog of time, then remove the fields/pastures). The entire industrial age will fit nicely in those 5 tree spaces, and the kids/laborers from that last f-h-t-h-f are enough to do it. With some finagling/switching around, I even got the entire industrial age to fit inside only four tree spaces. Just remember, when you're starting the industrial age, leave a tiny space just to the left of the trees you're propagating forward, used for the electrical poles you'll eventually use to channel electricity back to that aforementioned house.