This video does an excellent job explaining the answer to the question, "How small is an atom?  It compares an atom to the size of a grapefruit and a blueberry.  It is amazing to visualize just how small atoms really are.
 If you happen to be teaching about atomic structure, this might help your students understand this particular scientific concept.

For most of history, scientists weren't quite sure why our hearts were beating or even what purpose they served. Eventually, we realized that these thumping organs serve the vital task of pumping clean blood throughout the body. This video investigates how it all works by taking a closer look at the heart's highly efficient ventricle system.

Students will practice rounding to the nearest 100.  There are number lines to give a visual if they need them.  Also, there are two elapsed time review questions.

Students will practice rounding numbers to the nearest 10.  Two number lines are included for reference as well as two elapsed time problems for students to practice.

Using colored pencils or crayons, students will read some Christmas puns and then identify nouns, verbs, pronouns, Adverbs, and Adjectives with different colors.

A simple worksheet to give students a chance to practice calculating elapsed time using a number line. The directions instruct students to label the number line and to circle their final answer. The problems are based on actual students and activities that they enjoy! This practice sheet also features a clock for fast-finishers to color.

This worksheet provides students with three problems to practice finding start time by labeling and using a number line. The directions instruct students to label each number line and then to draw a dot on where they believe the start time is on their number line. Questions are based on actual students and things that they enjoy to do in real life! This worksheet includes a clock that fast-finishers can color.

This 3rd Grade comparing and equivalent math worksheet was designed as an end of unit review.  It contains 6 normal comparing fractions problems using <,>, and =.  The worksheet has 2 fraction problems using number lines. It also has pie charts and bar charts divided into fractions.  Finally, students will shade in the equivalent fractions on 4 rectangles that are divided into fractions.

This 3rd-Grade equivalent fractions worksheet has 6 pies and 5 bars divided into fractions.  Students will use those charts to find the equivalent fractions.  There is a bonus question where students will create their own equivalent fraction.

In this equivalent and comparing fractions review worksheet students will demonstrate their understanding of fractions.  Students will illustrate their knowledge of comparing fractions using number lines and pie charts, the butterfly or cannon method of comparing fractions, a few word problems that compare fractions,s and finally demonstrate that they understand that a fraction with a denominator of 1 will be a whole number and a fraction that has the same denominator as the numerator is equal to one.