

Students develop understanding by solving equations and inequalities intuitively before formal solutions are introduced. Word problems relate algebra to familiar situations, helping students understand abstract concepts. In Key to Algebra new algebra concepts are explained in simple language, and examples are easy to follow.Students who learn to use the metric system early will be more comfortable as adults with this form of measurement. In Key to Metric Measurement students learn how to measure in metric units-the only system used in international commerce and communication, and one becoming used in science and technical fields.Group projects are included, in addition to numerous individual activities. Students using Key to Measurement will enjoy a variety of hands-on experiences related to the English system of measurement.Key to Percents assumes only knowledge of fraction and decimal computation. Finally, percents are used to solve word problems in a variety of applications. Then students are taught to solve percent problems using equal fractions and decimal multiplication. Key to Percents emphasizes mental computation and estimation skills.Visual models illustrate new concepts, and simple, easy-to-follow instructions let students work on their own or in small groups as they master essential math skills.

Then it covers real-world uses of decimals in pricing, sports, metrics, calculators, and science. Key to Decimals begins with basic concepts and operations on decimals.When they finish, students will have been introduced to 134 geometric terms and will be ready to tackle formal proofs. Later they do sophisticated constructions involving over a dozen steps. Using only a pencil, compass, and straightedge, students begin by drawing lines, bisecting angles, and reproducing segments. Key to Geometry introduces students to a wide range of geometric discoveries as they do step-by-step constructions.Key to Fractions works well for elementary students learning new skills as well as for older students revisiting topics.

Handwritten examples provide a non-threatening model, and exercises are structured to ensure student success. Key to Fractions covers topics from basic concepts to mixed numbers.With Key to.® workbooks, you can customize curriculum for individual learners.
