This Math in Focus Homeschool Pack contains the Math in Focus books needed by 4th grade students as well as the answer key. This Homeschool kit includes: Workbook 4A, 193 pages, softcover. Workbook 4B, 170 pages, softcover. Textbook 4A, 300 pages, hardcover. Textbook 4B, 266 pages, hardcover. Homeschool Answer Key, 151 newsprint-like pages, softcover. Unlike the Grade 4 Math in Focus: The Singapore Approach Grade 4 Student Pack, it does not include the assessments book, and unlike the Math in Focus: The Singapore Approach Grade 4 First Semester Homeschool Package and Math in Focus: The Singapore Approach Grade 4 Second Semester Homeschool Package, it does not include the full teacher's edition. The full teacher's edition provides objectives, material lists, games, detailed step-by-step lesson instructions, and reproducible blackline masters; however, they are not required to teach this curriculum. Based upon the Singapore method of teaching mathematics, Math in Focus features a problem-based approach that builds on a concrete-to-pictorial-to-abstract progression. Within each grade fewer topics are taught, but at a more in-depth level; visual representations, modeling strategies, and a development of conceptual understanding, place value, and computation fluency help students to understand the "how" behind their exercises. The consumable student workbooks provide practice, assessment, and skill-development exercises based upon the text lessons. In the textbooks, cheery illustrations and easy-to-understand lessons give kids a fun atmosphere to work in and a simple way to understand abstract math concepts. The answer key includes the answers to the practice exercises, "Put on Your Thinking Cap" exercises, math journal activities, and chapter review/tests. Four student pages are reproduced on each answer key page with the correct answers overlaid. Please note that this key only contains answers; no teaching instructions are included. Black and white newsprint-like pages. The first semester (4A) covers place value, estimation & number theory, whole number multiplication & division, tables & line graphs, data & probability, fractions, and mixed numbers. The second semester (4B) covers adding & subtracting decimals, angles; line segments, squares & rectangles, area & perimeter, symmetry, and tessellations. Real-life problems are integrated throughout all chapters.