As of 2015, the teacher answer key for Math Bits is obtained by emailing Roberts@MathBits.com from a school email address. The parents' answer key is obtained by registering with MathBits and waiting out the one-week holding period.
Answer keys are available for all lessons and activities, but can only be accessed after paying for a subscription. Profits from all subscriptions go toward animal shelters and MathBitsNotebook.com. Founded by math teachers Donna M. Roberts and Fredrick H. Roberts, MathBits offers lessons for secondary and college-level mathematics, such as algebra and trigonometry, while its partner site, JrMathBits.com offers lessons for middle school students.
All content, materials and graphics at MathBits are copyrighted, and the website is not part of the public domain. Users are not allowed to copy or reproduce any section of MathBits for commercial use, and the website may not be used for private tutoring. Users are allowed to use MathBits for their own non-commercial private use and for private use within a classroom with face-to-face students. Various downloadable forms are available for free, such as graph paper and worksheets, but users are not allowed to use these resources as a template to create derivative works or for commercial purposes.