This would be a great adventure for families as well as classrooms! Check out
http://www.negpp.org/! there is a challenge there to visit all of the 15 listed Nebraska state parks! If you want to participate, you must register there on the web site.
This might be a great summer project to continue to engage students in Nebraska Geography! Have your own Great Park Pursuit! Challenge your next group of students (any age would love this) to get to as many of Nebraska's parks this summer as they can. Once they get there, have them take a picture of the park sign and two more pictures from inside the park. They must then email those pictures to you, the teacher. You can create a map in Google Earth and mark their travels using the pictures they took! This would also make a great competition between class sections or maybe between conference schools! (They could even use their cell phones and send those pictures if your cell plan will handle that!)
Most importantly, encourage your students to get out and enjoy Nebraska's state parks!
http://www.negpp.org/