Purple Math
Purplemath: Rounding and Significant Digits
Explains how to round to a given number of "significant digits".
SMART Technologies
Smart: Dice and Card Math Games
Kids love dice and playing with decks of cards. Leverage these two great (and inexpensive tools) to help students work on math facts, place value and more.
Robin L. Simmons
Grammar Bytes: The Noun
This "grammar with attitude" site provides an easy-to-understand explanation of what nouns are, how they work in a sentence and how they can be classified.
Quia
Quia: Five Themes of Geography Phrases and Keywords
Quiz takes phrases and key words and you pick the theme of geography the phrases describes.
Sophia Learning
Sophia: Expanded Place Value of Decimals
This lesson explains that each digit in a decimal number has a value related to its positional representation.
ClassFlow
Class Flow: Nouns
[Free Registration/Login Required] This flipchart introduces nouns: person, place or thing. There are opportunities provided for students to practice.
ClassFlow
Class Flow: Five Themes of Geography
[Free Registration/Login Required] This flipchart reviews the five major themes of geography; location, movement, place, region, human environment and interaction. An online quiz is included in the flipchart.
Purple Math
Purplemath: Place Value: Concepts
Explains and illustrates the thinking behind the concept of place value.
Purple Math
Purplemath: Rounding Numbers
Reviews how to round numbers to a given place or number of decimal places.
Other
Schoolhouse Rock: Nouns
This site from Schoolhouse Rock provides the lyrics to a song about nouns. Sing this song in your head the next time you need to know which word is the noun. It's easy to remember once you've heard it. From the popular 1970s cartoon...
Curated OER
Virginia Population Density
Although this site talks about regions in Virginia, it offers excellent information on regions in general, for example, ways regions might be classified; by population density, geology, watershed, ecosystem, economy, transportation,...