Intermediate-level mathematics - Good sites for kids Math Doesn't Suck and Kiss My Math. These are two books by Danica McKellar, of The Wonder Years, who grew up and earned a Bachelor's in Mathematics. ... Math Worksheets Center is home to over 8,000 K-12 math worksheets, lessons, homework, and quizzes. We also offer over 130 free math teaching and learning articles." These are on their Mathtips ...