40 PowerPoint slideshows to improve mental math skills: multiplication, division, addition, subtraction, money, fractions, patterns, shapes, odd and even, comparing, place value, measuring, perimeter, and more... Thousands of third-grade math problems to use throughout the year. Use these slideshows at the beginning of a lesson, right before recess, at a Math Center, for remediation, as extra practice, or as a sponge activity. Every problem is followed by its solution (for immediate feedbac