Edgenuity, Connections Academy and American High School all offer seventh-grade curriculums. Tuition-free virtual education is also available through many states' Departments of Education. The laws regarding online education and homeschooling vary from state to state.
Many states now offer tuition-free online education for K-12 students. In some states, parents may opt to pay for private virtual education. In either case, it is important to contact your local school district or the state Department of Education to make sure that you are complying with state law. Onlineschools.com is a good tool for searching for virtual education. You can search according to specific criteria and see school ratings.
Many public libraries have information about local homeschooling groups. Connecting with other parents in your area is a good way to plan social and educational activities and get information about online curriculums.