Khan Academy
Khan Academy: Add and Subtract Fractions: Word Problems
In this exercise, students practice adding and subtracting fractions with unlike denominators word problems. Students receive immediate feedback and have the opportunity to get hints and try questions repeatedly.
Mangahigh
Mangahigh: Algebra: Add and Subtract Algebraic Fractions Using Factoring
Students learn about the concept of adding algebraic fractions by exploring a tutorial. They can then test their knowledge by taking a ten question assessment that increases in difficulty as they correctly answer questions.
Science Education Resource Center at Carleton College
Serc: Mn Step: Stream Study: Assessing the Relative Health of Streams
Students will collect invertebrate samples from three different streams using nets and kick-seines. They then identify what they have found and add the information to the whole class data. Afterward, students propose a new question about...
Scholastic
Scholastic: Study Jams! Math: Relate Adding, Subtracting
Watch a short video on the relationship between addition and subtraction then assess your knowledge with practice questions.
CK-12 Foundation
Ck 12: Parallel Lines and Transversals
[Free Registration/Login Required] Students will answer real world problems by determing where to add the additional beam using parallel lines and transversals. Click learn more to watch a video and click challenge me to answer a...
CK-12 Foundation
Ck 12: Elem Math: Visually Finding Capacity in Milliliters
[Free Registration/Login may be required to access all resource tools.] In this learning module, students read the marks on a beaker and record the number of milliliters of water. The process is demonstrated in the accompanying video....
CK-12 Foundation
Ck 12: Elem Math: Mixed Operations Selecting the Correct Sentence
[Free Registration/Login may be required to access all resource tools.] The video shows how to add and subtract three digit numbers to determine which number sentence matches the correct solution. The video is followed by a series of...
CK-12 Foundation
Ck 12: Elem Math: Mixed Operations Selecting the Incorrect Sentence
[Free Registration/Login may be required to access all resource tools.] The video shows how to add and subtract three digit numbers with two operations in a number sentence to determine which number sentence does not match the correct...
CK-12 Foundation
Ck 12: Elem Math: Solving for Start Time End Time or Elapsed Time
[Free Registration/Login may be required to access all resource tools.] The video involves filling in a chart of start time, end time, and elapsed time describing how to add and subtract time in hour and minutes. The video is followed by...
CK-12 Foundation
Ck 12: Elem Math: Calculating Sums: Less Than, Greater Than, or Equal To
[Free Registration/Login may be required to access all resource tools.] Locate the video "Calculating Sums: Less Than, Greater Than, or Equal to Numbers (Numbers to 1,000)." In this learning module, students must add or subtract to find...