Yes, there are several free online resources available for SAT preparation:

1. Official SAT Practice:
- The College Board, the organization that administers the SAT, offers free practice materials on their website. This includes a full-length practice test, sample questions, and answer explanations.
- They also provide personalized study plans and progress tracking through their online platform.
- To access these resources, students can create a free account on the College Board website.

2. Khan Academy:
- Khan Academy has partnered with the College Board to provide free SAT practice materials.
- They offer a personalized study plan based on a student's PSAT/NMSQT results or a diagnostic quiz.
- Khan Academy provides thousands of practice questions, video lessons, and quizzes to help students improve their skills in specific areas.
- Their platform also tracks progress and provides detailed feedback on areas that need improvement.

3. EduRev:
- EduRev offers a wide range of free SAT study material, including practice tests, sample questions, and study notes.
- They provide detailed solutions and explanations for each question to help students understand the concepts better.
- EduRev also has a user-friendly interface, making it easy to navigate and access the study material.

4. PrepScholar:
- PrepScholar offers a free SAT preparation course that includes video lessons, practice questions, and customized study plans.
- They provide detailed explanations for each question and track progress to identify areas that need improvement.
- PrepScholar also offers additional resources such as study guides and strategies for tackling different types of questions.

5. Ivy Global:
- Ivy Global provides free SAT practice tests and sample questions on their website.
- They offer downloadable PDFs for each section of the SAT, including Math, Reading, and Writing.
- Ivy Global's practice tests closely resemble the actual SAT, making them a valuable resource for test preparation.

These free online resources can be accessed anytime and anywhere, allowing students to study at their own pace and focus on specific areas that need improvement. It is recommended to utilize a combination of these resources to get a comprehensive SAT preparation experience.