Count and convert measurements for liquids, lengths and time with this supplemental book! So many practical skills come from knowing how to measure lengths, tell time and convert units of measurement.

Pay homage to our majestic, leafy companions with this series about trees. Kids can learn about the structure of trees, identify different leaf types and reflect on the many gifts that trees give.

Why does the earth spin? How is a rainbow formed? Feed the flame of curiosity in your child, and find out the answers to some of those age-old questions about how the world works.

It's fact vs. opinion statements about interesting animals in this workbook. Kids will also think about how diagrams and images help clarify reading passages.

Learn presidential history, the functions of government and how elections work while having a blast. Read, write, color, cut and paste the way to knowledge of the past and present!

Math is part of everyday life, so learn math concepts with everyday examples. Learn to calculate sales tax, discounts, income, expenses and how to get more bang for your buck!

Things are jumbled up at the newspaper! Your child has the know-how with the help of this workbook to set things right. Review grammar rules and practice composition through reading passages.

What's a metaphor? How do you haiku? Kids will hone reading and writing skills with this book, from a simple syllable counting exercise to inventing rhymes and tangling with the Jabberwocky!

Get a great introduction to word problems with this round up of practice pages. Kids will review addition and subtraction from a different approach, and learn how math can apply to the real world.

Did you know that light can bend? Help your curious kids learn the important physical properties of light and explore how light adds colors to our world, with this beautiful series on light and color.

When Olympic swimmer Michael Phelps won a race by .01 of a second, we saw how significant a hundredth of a second can be! This series offers practice with decimals to build a solid understanding of the place value system.