Our participation needs improvement as well.
fyi
We don't require, but encourage/ask students to read at least two books over the summer.
We provide a reading log for them to track their reading and ask that they return the log at the start of the school year for a chance to win a raffle prize. (eg. Barnes and Noble gift card) We used a Teen Book Bingo sheet the first year I came. I remember collecting a lot of bingo sheets that September! The resource and idea came from the Burke Museum of Natural History and Culture. A source that may be helpful is
www.spl.org/summeroflearning
We decide on a theme, create flyers including links to reading sources (eg. Governor's Reading Challenge) and "benefits for summer reading", etc. The flyer is accessible on the district website.
Last year, we started a June Summer Reading Kick Off Ice Cream Social event. We invited our community library to promote their reading program as well as offer library card sign up. The ice cream came from our local ice cream shop. Students received cinch sac bags (with school name/logo) to fill up at the event with free bookmarks, ice cream coupons, summer reading flyer/reading log, and their first summer reading book. We are a 6-8 school, so we invited students coming up from the fifth grade. The upcoming fifth grade students were the majority of our event participants.
Hope that helps!🙂