20 Days of Essential Math Skills Warm-Ups. Used weekly, this provides a year of practice. Daily independent practice useful to ensure and support math skills for grades 6th through secondary. Skills such as conversions, rounding, exponents, absolute value, patterns, and fractions are used daily in math content classes. Help students amitn. Useful in special education and general education settings for students of all grades. Practice essential skills necessary to compute more difficult content in grade level math classes. Go over each day together and make the last column an independent graded assignment.