Many local schools and school districts offer homework help. Check with your local school for more information.

Many local public libraries offer free homework help for all junior high (and other grades) both at the library and many online. Requires library card. Do a Google search for free homework help libraries near me or something similar.

Also many states offer free homework help (you must be a resident) . Do a Google search for your state free homework help or something similar.

Be sure to check out Libraries for online libraries and Reference Desk for online dictionaries, encyclopedias, and other reference online information sites.

General: Here is a list of some of the best free online Homework help sites for junior high students (may include other grades)
Awesome Library: Site has homework help links for grades K-12 and common subjects.
Fact Monster: Free reference site for children, teachers, and parents covers all subjects multiple grades.
GradeBook - The Classroom: A one stop free education resource for primary schools, middle schools, high schools, colleges, students, teachers, administrators, guidance counselors, librarians and parents.
Hippo Campus: Free, middle school to high school. More than 5,700 free videos collected from various academic institutions in 13 subject areas, including algebra, geometry, calculus, earth science, biology, physics, history, and English.
Homework Help - 1 America: Links to reference tools, writing tools, history, geography, science, math, etc.
HomeworkSpot: A gateway to relevant sites and resources for K-12 students needing homework help in most any subject area .
Infoplease Homework Center: Includes encyclopedia, dictionary, almanacs, and homework help on English, math, history, geography, science, and social studies.
Khan Academy: nonprofit with the mission to provide a free, world-class education for anyone, anywhere. Offers free practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom K-12 & college).
refdesk.com - My Homework Helper: Links to homework help sites K-12 & college.
School Family - Homework: Help your child get organized, improve study skills, and learn best from their homework for K - High School.
Study Pool: Get free help, post your free homework questions and get answers from qualified tutors, junior high and up.
ThoughtCo: Resources to help Improve your study skills.
teach-nology.com Homework Help: Links to useful homework help sites, k-12.
Wyzant.com - Lessons: Lessons and help for English, math, science, Spanish & history.

English: List of online English help sites.
English-The-Easy-Way: Designed for people learning English as a second language, but it is a useful general resource.
Purdue University On-line Writing Lab: Resources specifically created for grades 7-12 students.

Math: List of online math help sites.
Math.com: Students, parents, teachers and anyone with math questions can find homework help, math lessons, mathematical games and math tools.
AAA Math: features a comprehensive set of interactive math lessons.
Wyzant - Algebra Help: collection of lessons, calculators, and worksheets to assist students.
Coolmath.com: free online math lessons & games for junior high & up.
Math.com Homework Help: Great help with pre-algebra, algebra and geometry.
mMath Is Fun: 7-8 grade, algebra, fun site with math games.
mathwords.com: Terms and Formulas from Beginning Algebra to Calculus.