I teach grades 3-4 so these thoughts may have to be tweaked to fit . . . One way of paving the way to having students continue to love reading is to regularly read to them — carefully chosen, high quality books. It is true that one reason I jealousy guard our daily classroom story time slot is simply because I want them to love to read. Only on rare occasions do I cut out our story time; if need be (as in these past two weeks with a lot of time going into spring program practice) I ask them to do some work like penmanship or other work they can do while still listening to the story. Is it possible to have a slot of time to read to high schoolers?
Another thing I intentionally do to promote a love of reading is buy (new to us, but used) books to put into the library. Lots of them. When you buy them used (in great condition), you can buy a lot of books for not so much money. Sometimes they get to help me unpack them when they arrive to our school address, but usually I have them sent to my house and proof them (in varying degrees of carefulness) before making them available to the students. The students love this and regularly check out the next one from the shelf in the room specifically designated for these “new” books. Next year they will be in the main library, but for this year, they get first dibs. This has created a lot of enthusiasm for reading and makes a real difference in how much they read. I cannot, however, say how it is after they head to higher grades. But this is how I try to plant seeds.