Add and Subtract Intervention is a systematic method of teaching your student or child addition and subtraction math facts by using proven techniques with Incremental Rehearsal. This application is designed by Kindergarten and First Grade Educators at top elementary schools who have effectively used these techniques to teach many students as part of core curriculum. Now your student or child can leverage our experience to master addition and subtraction to build a strong foundation for math and problem solving. This application allows you to complete comprehensive assessments of your students' abilities in solving addition and subtraction math facts from 0 through 10. After completing assessments, you can focus interventions by selecting nine known math facts and one unknown for the student. Through incremental rehearsal, known math facts are reinforced while those not yet known are mastered. These techniques have been proven to work in many classroom and home settings. This application guides you through interventions by presenting math facts in the following order, where Z is unknown and A through I are known by the student: Z A, Z A, B, Z A, B, C, Z A, B, C, D, Z A, B, C, D, E, Z A, B, C, D, E, F, Z A, B, C, D, E, F, G, Z A, B, C, D, E, F, G, H, Z A, B, C, D, E, F, G, H, I, Z For each interaction in assessments or interventions, the facilitator records whether the student knows the math fact or not. The application tracks each and every assessment, automatically recording proficiency when the student reaches 80% for the math fact or marking as unknown if proficiency drops below the 80% threshold. Detailed reports show the following: - Percentage known by category and each number - Count of math facts learned by week - Charting of math facts learned by week compared to goal We hope this offering increases your students' abilities in mastering math basics. We gladly accept feedback and strive to provide the best products for you and those wanting to teach and learn.