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Learn all about Alexander Fleming, the man who invented penicillin and the happy accident that brought him to it.

Looking for a worksheet that will give your kid help with his life-science skills? This printable will challenge his knowledge of birds.

Think toads and frogs are the same? Think again! Check out this breakdown of the differences between the two, complete with a quiz to check your new knowledge.

Learn a bit about the Brazilian rainbow boa with this cool science worksheet.

Get the facts on the beautiful elk, an American treasure and a symbol of Yellowstone National Park.

Searching for a worksheet that will help your child practice their reading skills? This printable uses life science as a background to help young readers.

Looking for a fourth grade worksheet to help your kid with science? This printable will test his knowledge of the water cycle.

This helpful worksheet lays out all the qualifications for planethood. A great way to start studying outer space science!

Did you know jaguars are great swimmers? Kids will learn all about rainforest animals with this fun activity page, including a word search and coloring!

Animal lovers can learn about sea creatures like sharks, tortoises and seahorses with this ocean habitat activity page, full of fun facts and a word search.

Ever wonder what's inside a camel's hump? Your child will become familiar with animals that live in the desert with this fun activity sheet!

Can your child name 10 animals that make their home in the mountains? After completing this worksheet, he'll know all about mountain habitats!

Which animals can live happily alongside humans? With this word search, match up game, fun facts, your child will learn more about urban animal habitats.

Fly high with The Wright Brothers, two siblings who soared to the forefront of history with their design for the first modern airplane.

Guglielmo Marconi was a man who made waves in radio and sound. Learn about his life and work, then answer a short essay question in this science worksheet.

Searching for a worksheet that will give your kid help with his science skills? This printable will challenge his knowledge of the metric system.

Searching for a worksheet that will give your kid help with his science skills? This printable will challenge his knowledge of plants.

Test your child's science savvy with this worksheet, which asks your child to identify what items are made from plants.

Give your kid help with his science skills with this worksheet, which practices natural disaster vocabulary.

Teach your child about plants with this worksheet, which helps your child practice botanical vocabulary.

Help your child practice his science skills with this science worksheet, which will challenge his knowledge of reptiles and ask him to solve a puzzle!

Children match animals to their ecosystems in this life sciences worksheet.

The next time your parents ask you to wash your hands before dinner, read this worksheet about Joseph Lister and take their advice!

Test your third grader's biology knowledge with this worksheet, which challenges him to separate invertebrates from animals with a backbone.

Budding scientists can learn about an important physical science concept with this worksheet all about density!

The insect order Hemiptera consists of True Bugs such as Stainers, Assassin Bugs, Leaf-Footed Bugs, and this Boxelder Bug.

Use this cool 2-page worksheet to make your own big dipper clock!

Science can be a bit of a bore to some students, but with this quick worksheet on chemical and physical reactions, it can at least be a breeze.

Help kids understand the size and scope of billions of years with this helpful reference worksheet.

Learn about how the Earth was formed in this science worksheet that covers the early years of the Earth.