• Curriculum Overview: SRA Corrective Mathematics is a direct instruction math program with modules available in the areas of (a) addition, (b) subtraction, (c) multiplication, (d) division, (e) basic fractions, (f) fractions, decimals, and percents and (g) ratios and equations. Students are instructed at their own pace in small groups using consumable workbooks. SRA Corrective Mathematics is published by McGraw-Hill Education.