As of 2014, the military.com website is considered a top resources to get help on the ASVAB (Armed Services Vocational Aptitude Battery) math section because the test is specifically designed for entrance into the U.S. Military. Some other resources include: Cram.com, YouTube video tutorials, the official ASVAB test and some bookstores that have study guides available.
The most recommended resources, however, are the math classes taken in high school and even middle school. The ASVAB test does not include questions that are not relevant to the military.
The ASVAB does not have a pass or fail grading system; it is a skill-level awareness exam.