Kuta has free math worksheets containing sets of exercises and problems in pre-algebra, algebra, geometry and calculus. Every course subtopic has its own worksheet in PDF format, and students have space to write in their answers on the printed version.
Kuta's software gives high school and middle school math teachers lots of options to create their own worksheet questions geared to the specific needs of their classes. Most of the topics are based on Common Core standards. After the teacher selects certain options, then the software randomly selects variables and numbers and generates all the possible questions for that situation.