I afterschoooled last year all year. We did Aleks and Khan Academy, did a lot of reading together of higher level books and messed around on a lot of websites. Anytime we'd go to a museum or any sort of "field trip" like event, I'd look at their website to see if they had a teacher's packet or a recommended activities at the museum. We also go to the library a lot and get science project books, cookbooks, movies and whatever else looks interesting.