There are several websites that have somewhat follow-able directions.
I was pleased with my students' response today--and with the other students who joined us. Kids were teaching each other and it was nice to see the interaction between all of them. They were doing this in their free time (and also during my art classes). I had the art room open after school today for this purpose.
I'm realizing that for a small school 1000 cranes is a LOT. But the students who were with us today are recruiting others. Several faculty members plan to join us, too.