Determine if a source is credible using a table of key questions in a document. Time to complete: 45-90 minutes
Demonstrates the role of parentheses in a written expression by solving one with and without the parentheses. [2:06]
Khan Academy learning modules include a Community space where users can ask questions and seek help from community members. Educators should consult with their Technology administrators to determine the use of Khan Academy learning modules in their classroom. Please review materials from external sites before sharing with students.
Sal Khan illustrates an evaluating expressions example that has two variables. [2:05]
Khan Academy learning modules include a Community space where users can ask questions and seek help from community members. Educators should consult with their Technology administrators to determine the use of Khan Academy learning modules in their classroom. Please review materials from external sites before sharing with students.
An excellent tip sheet on how to evaluate and edit a completed draft of a research paper. Includes in-depth information and examples.
In this NASA video, scientists describe how the Extreme Ultraviolet Variability Experiment will sample and track the Sun's ultraviolet irradiance, providing a detailed time sequence of extreme ultraviolet output -- data that can provide advance warning for potentially disruptive energy bursts.
Get the facts about the Evening Grosbeak. Besides finding a detailed physical description of this member of the finch family, you?ll also learn about some of this bird's unique facts and characteristics. Also included in this Bird Fact Sheet on the Evening Grosbeak is information on its habitat and habits, range, feeding, breeding, and conservation efforts. A list of resources completes the fact sheet.
In this video segment from WILD TV, a scientist in the Florida Everglades talks about her research on the pig frog. [6:25]
How much radiation are we exposed to every day? Find out in this video segment adapted from FRONTLINE: "Nuclear Reaction." [1:46]
An overview of the different types of evidence that support evolution, including homologous and analogous features and vestigial structures. [12:59]
Khan Academy learning modules include a Community space where users can ask questions and seek help from community members. Educators should consult with their Technology administrators to determine the use of Khan Academy learning modules in their classroom. Please review materials from external sites before sharing with students.
This video segment adapted from NOVA tells the story of two scientists who inadvertently discovered microwave radiation, now believed to be heat left over from the Big Bang. [4:58]
Explore the evidence of evolution with this interactive worksheet based off of NOVA's Evolution Lab. This resource is designed to be completed while playing through the Evolution Lab game and contains multiple choice and free response questions and covers Mission 1 of the Evolution Lab game with embedded videos. Mission 1 introduces students to natural selection and how to interpret and create phylogenetic trees. Below are links to the remaining missions of the Evolution Lab.
On May 21, 1921, hundreds of Black-owned businesses and homes in the Greenwood district of Tulsa, Oklahoma, were burned to the ground, killing an estimated 100-300 Black residents and leaving an estimated 10,000 Black residents homeless. The victims were buried in unmarked mass graves. This media gallery from Tulsa: The Fire and the Forgotten explains why the search for physical evidence is so important, 100 years after the Tulsa Race Massacre. Support materials include activities for middle and high school students and a student handout.
Compare distributions using the features of shape, center, spread, and outliers.
Khan Academy learning modules include a Community space where users can ask questions and seek help from community members. Educators should consult with their Technology administrators to determine the use of Khan Academy learning modules in their classroom. Please review materials from external sites before sharing with students.
In this free Excel tutorial, learn how to create formulas and charts, use functions, format cells, and do more with your spreadsheets.
Lessons include: (1) Getting Started with Excel. Learn your way around the Excel environment. (2) Understanding OneDrive. Learn all about working with your Microsoft account and OneDrive. (3) Creating and Opening Workbooks. Learn how to create and open Excel workbooks. (4) Saving and Sharing Workbooks. Learn how to save and share Excel workbooks.
In this free Excel 2010 tutorial, learn how to create formulas and charts, use functions, format cells, and do more with your spreadsheets.
Lessons include: (1) Getting Started with Excel. Learn your way around the Excel 2010 environment. (2) Cell Basics. Learn how to insert and delete cells and cell content, drag and drop cells, use the fill handle, and use the cut, copy, and paste functions. (3) Modifying Columns, Rows, and Cells. Learn how to modify rows, columns, and cells in Excel. (4) Formatting Cells. Learn all about formatting text in Excel. (5) Saving. Learn how to use the Save and Save As commands, save as a PDF, and save as an Excel 97-2003 compatible workbook. (6) Creating Simple Formulas. Learn how to create a simple formula in Excel. (7) Worksheet Basics. Learn how to add, delete, copy, and move worksheets, as well as group and ungroup worksheets and freeze rows and columns. (8) Printing. Learn how to preview your spreadsheet, modify margins, change page orientation, and print.
In this free Excel 2013 tutorial, learn how to create formulas and charts, use functions, format cells, and do more with your spreadsheets.
Lessons include: (1) Buying Office 2013. If you're thinking about buying Office 2013, there are a few things you should consider before your purchase. (2) Working with Your Microsoft Account and OneDrive. Learn all about working with your Microsoft account and OneDrive. (3) Understanding Office 365. Learn what you need to know about Office 365, a subscription-based version of Office 2013.
In this free Excel 2016 tutorial, learn how to create formulas and charts, use functions, format cells, and do more with your spreadsheets.
Lessons include: (1) Getting Started with Excel. Learn your way around the Excel 2016 environment. (2) Understanding OneDrive. Learn all about working with your Microsoft account and OneDrive. (3) Creating and Opening Workbooks. Learn how to create and open Excel workbooks. (4) Saving and Sharing Workbooks. Learn how to save and share Excel workbooks.
In this interactive tutorial, learn how to create formulas to solve real-world problems.
Lessons include: (1) About This Tutorial. Learn more about using formulas and functions in Excel or another spreadsheet application.
Learn these Excel tips and tricks so you can do more with this popular spreadsheet program.
Lessons include: (1) Add the Current Date to a Cell. Learn how to add a date or time stamp to any cell with this Excel keyboard shortcut. (2) A Faster Way to Use the Fill Handle. Learn a faster way to use the fill handle in Excel. (3) Two Ways to Use the Format Painter. Learn how to use the Format Painter in Excel. (4) A Shortcut to AutoSum. Learn an Excel keyboard shortcut that makes the AutoSum function even faster. (5) Quick Access Toolbar Shortcuts. Learn how to add shortcuts to the Quick Access Toolbar in Excel. (6) How to Quickly Duplicate a Sheet. Learn a shortcut for making an exact copy of an existing worksheet. (7) Jump to Any Sheet with a Shortcut. Here's a shortcut for quickly jumping to any sheet within a workbook. (8) Select an Entire Row or Column. Learn these Excel shortcuts for selecting an entire row or column at one time. (9) Find a Sum Without Using a Formula. Here's how to find a sum without using a formula. (10) Why You Should Avoid Merging Cells. Use the Center Across Selection feature to easily merge cells in Excel. (11) Using the Quick Analysis Tool. Learn how to browse through different visualization options with the Quick Analysis tool. (12) How to Make Charts Auto Update. Learn how to use tables to keep charts up to date using this Excel feature. (13) Use Transpose to Flip Data on its Side. Here's how to use the Transpose feature to rearrange your data instantly. (14) Absolute References with the F4 Key. Learn how to convert a cell reference to an absolute reference with the F4 key. (15) Add a New Row with a Shortcut. Learn a keyboard shortcut that lets you add a row anywhere in your spreadsheet. (16) Use an Entire Column as a Cell Range. Learn how to use an entire column as a cell range in Excel. (17) What are Named Ranges?. Learn how to use named ranges to make your formulas easier to write and read. (18) A Trick for Finding Inconsistent Data. Here's a trick for quickly finding inconsistent data in a large spreadsheet.
This audio compilation, recorded live at the 1963 March on Washington, captures the voices of several civil rights leaders.