PAID printable but has a neat test maker and lots of different worksheets year math, ELA, science, social studies, and seasonal tests/worksheets with an option to administer tests online (with auto-grading).
This is a list of 100 social studies apps/websites/resources for kids. If one of them pertains to a specific unit/lesson you can have the students play/explore the content. You could also have them play these social studies games in their free time.
Past or Present FREEBIE Social Studies Sort Social Studies - History, Other (Social Studies - History) Worksheets, Activities, Printables. Sort the pictures from the past and present. An answer key is included.