Key To Math

February 2, 2011
Rating: 4.0/5. From 1 vote.
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Key To . . . math series

Content: Mathematics
Grade(s): 2nd – 8th
Religious Perspective: Secular
Prep Time: None
Teacher Manual: None
Teacher Involvement: Not needed
Cost: $ || ?
Pages: Varies
Publication Date: 1993
Updated Review: July 6, 2016

Common Core Aligned: No

Review of Key to Math series

Key To are self-paced, self-guided workbooks—covering topics from fractions and decimals to algebra and geometry. The workbooks offer bite-size, easy-to-follow lessons. Simple language and clear visual models help students grasp concepts quickly. The large number of problems ensures complete mastery.

Key to Fractions covers topics from basic concepts to mixed numbers. Handwritten examples provide a non-threatening model, and exercises are structured to ensure student success. Minimal reading is required. Book 1: Fraction Concepts. Book 2: Multiplying and Dividing. Book 3: Adding and Subtracting. Book 4: Mixed Numbers.

Key to Decimals begins with basic concepts and operations on decimals. Then it covers real-world uses of decimals in pricing, sports, metrics, calculators, and science. Book 1: Decimal Concepts. Book 2: Adding, Subtracting, and Multiplying. Book 3: Dividing. Book 4: Using Decimals.

Key to Percents emphasizes mental computation and estimation skills—because most work with percents is done without pencil and paper. Then students are taught to solve percent problems using equal fractions and decimal multiplication. Finally, percents are used to solve word problems in a variety of applications. Book 1: Percent Concepts. Book 2: Percents and Fractions. Book 3: Percents and Decimals.

Key to Measurement offers a variety of hands-on experiences related to the English system of measurement. Group projects are included, in addition to numerous individual activities. Book 1: English Units of Length. Book 2: Measuring Length and Perimeter Using English Units. Book 3: Finding Area and Volume Using English Units. Book 4: English Units for Weight, Capacity, Temperature, and Time.

Key to Metric Measurement teaches students how to measure in metric units—the only system used in international commerce and communication. Book 1: Metric Units of Length. Book 2: Measuring Length and Perimeter Using Metric Units. Book 3: Finding Area and Volume Using Metric Units. Book 4: Metric Units for Mass, Capacity, Temperature, and Time.

Not a complete math curriculum in and of itself, Key To Math workbooks offer comprehensive problem sets that offer critical practice for kids struggling to master a targeted topic area in math. Key To Math workbooks have been a long-time staple of the homeschool community, particularly for families who use a spiral math curriculum, such as Saxon Math.

Each book is economically printed, without a glossy cover or thick pages. Its reasonable price lets families actually use each workbook as the consumable product it’s meant to be, rather than having kids copy problems into a notebook.

Answer Keys are available for purchase separately or as part of a complete bundle.

About the Author:
Steven Rasmussen has a bachelor’s degree in mathematics and holds a master’s degree in mathematics education from Temple University. He taught secondary mathematics for seven years in Philadelphia, Pennsylvania, and Emeryville, California. He co-founded Key Curriculum Press in 1971. Mr. Rasmussen has worked for two decades on software development, including The Geometer’s Sketchpad geometry software. McGraw-Hill bought out Curriculum Press in 2012.



  • Debi Robertson May 26, 2017 at 8:54 am

    My son loved this series. He could work these on his own. This series begins at the very basics, gaining the student’s confidence in their abilities. Could be too simple for some students.
    Economical: purchased the first book or tow. Tries it out, then bought the balance. Really cheap workbooks.

  • Hannah M. March 16, 2016 at 8:16 am

    My younger son used some of the lower level books of this series last year. I think they can easily be accomplished by middle schoolers (or even older elementary if their writing skills are decent) and seem to me to really be geared toward that level, rather than high school. I have not looked at the upper level books, so I’m not sure how much more complex they may get as you move up through the levels…

  • Sandra Macleod December 6, 2014 at 11:17 am

    My son used the first of these ten books while working on Singapore 5. The series is a consumable set of low-cost workbooks designed for a student to use alone. They are fairly dry but provide plenty of practice and start with pre-algebra concepts. I’ve known of families who have used these before a deeper study of algebra or along with the last books of Singapore.

  • Regena February 25, 2011 at 11:20 pm

    My older son used the older, standard edition of Singapore math which was all in metric, so I utilized these books to give him practice in English units of measurement, as well. They worked well for this purpose. The percents, fractions, and decimals books of this series provide a good pre-algebra foundation or drillwork for younger students who are doing algebra. I used several of these I had left over from my older son last year with the younger as drill work to help him get stronger in his algebra work. They worked well for that purpose.

    Key To is great for drill work or used in combination with other books in this series to comprise a complete program. They are very good to address particular problem areas in math. I wouldn’t use just one set (i.e., just decimals, or just fractions), alone, however, as a complete program for a year of math.

  • Davonna Cufley February 15, 2011 at 12:47 pm

    Key to… series is simple, clear, non-threatening for my gifted 3rd grader who left 2 years of public school hating math. He can work on it independently, and while it’s a bit redundant, I know he really has a conceptual understanding, and the whole booklet is short. We haven’t found the way to get his “spark” for math back yet, but I think that building his confidence with a solid foundation will help.

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