For this water on Mars worksheet, students use a diagram to answer four questions about the structures in the image. They find the dimensions of the image, the width of the streams half-way down their flow channels, the smallest feature...

Students determine the density of 1 drop of water. In this determining density lesson plan, students determine the mass and volume of a drop of water in the lab using appropriate lab techniques and calculate the density of a drop of water.

Learners examine the life of Sacagawea, the exceptional woman chosen to appear on the Golden Dollar, and write journal entries based on their research.

This site defines and describes significant digits along with examples. Includes references, citations, and links to further information.

College professor Dan Bach offers a review of various basic topics in arithmetic, pre-algebra, and algebra. Order of operations, exponents, square roots, variables, and combining terms are just a few of the many topics covered.

The resource examines the basic math skills needed for studying physics. Some topics include units, scientific notation, significant digits, and trigonometry. Example problems, graphs, and a chapter quiz are included.

What is rounding, and what does it mean to round up and round down? Learn how to round numbers via simple steps and examples.

Sometimes it is difficult to solve an equation exactly. But an approximate answer may be good enough!