Deluxe edition. Follows NCTM guidelines. An I Know It! book. Step-by-step examples, picture clues, and clear instructions will show your child how reading and math fit together. Lessons focus on using addition and subtraction concepts and skills in real-life situations. Principles and Standards for School Mathematics, published by the National (NCTM), was used as a guide in writing this book. Skills include: Writing number sentences; Using pictures, tables, and graphs; Using logical reasoning; Choosing the operation; Eliminating extraneous information; Guessing and checking. Review, reinforce & accelerate learning! All School Zone products are developed by skilled educators to provide the highest quality, up-to-date curriculum possible. Workbooks: Top-quality content, clear directions, and full-color illustrations make School Zone workbooks the best choice. Made in the USA.