Big History Project: free, online social studies course

Big History Project is a free, online social studies course that focuses on helping students make connections between the past, present, and future. The lessons offered are all instantly accessible to users, evaluated and updated by professionals regularly, and are customizable to suit a variety of needs. For teachers and parents doing long-term planning, the site offers semester and year-long course maps that can be used as a starting point for mapping. Register for a teacher account here.