Horizons 3rd Grade Math By third grade, math shifts to multi-step problem-solving and working across several concepts in the same lesson. Horizons 3rd Grade Math is a print-based, teacher-led math curriculum that gives your child daily practice through that transition. The full course runs 160 lessons across two student workbooks plus a teacher's guide, covering place value through the millions, addition and subtraction (carrying and borrowing through four digits), multiplication (facts 1-10 and multi-digit by single-digit), and division (facts 1-10 and one-to-two-digit quotients with and without remainders). It also touches on fractions, an introduction to decimals in tenths, telling time, money, both English and metric measurement, Fahrenheit and Celsius, geometry (lines, angles, perimeter, area, volume), Roman numerals, and bar, line, pictograph, and circle graphs. Horizons uses a spiral curriculum design, which means concepts are introduced briefly, then revisited again and again across the year with a little more depth each time. This contrasts with mastery-based programs, which work through one concept thoroughly before moving to the next. Spiral curricula are usually a better fit for kids who get bored doing the same kind of problem repeatedly, and for parents who'd rather their child see a concept five times across the year than spend a whole unit on it once. The teacher's guide walks you through each day's lesson, with daily lesson plans, answer keys, teaching tips, learning objectives, and 40 supplemental worksheets for concepts your child needs more time with. A manipulative schedule at the front of the guide lists which manipulatives appear in which lessons. The manipulatives themselves aren't included in the kit, and many families will consider them optional. Horizons 3rd Grade Math is nonreligious. Christian references begin in the grade 4 level of the series. Horizons 3rd Grade Math is a good fit for a third grader who's ready for a full math curriculum, and for a parent who wants a fully scripted lesson plan rather than building their own. The colorful pages and spiral approach make it a particularly good fit for kids who lose interest with extended drilling on one concept, or who are deflated by black-and-white workbooks.