Math Topics

Lists of web sites categorized by subject areas within mathematics.

Fractions

1. Interactive math tools
   ENC Digital Dozen Site  
   Date: 2004 Grade(s): Pre-K - 12 Cost: Free ENC#: 025708
   This Internet site contains 22 Java applets which let users explore applications of math from fractions to vector sums. There are applets for students to manipulate a fraction pie or an abacus, to explore volume and factoring, and to draw shapes or show simple fractals.
   (For more details, see ENC Record.)
   
   
2. Learning math: number and operations
   Featured in ENC Focus   ENC Digital Dozen Site  
   Date: 2003 Grade(s): K - 8 Cost: Free ENC#: 029239
   This Internet site offers a college-level online mathematics course designed to teach concepts involving numbers and operations to teachers of elementary and middle school. The site focuses on the relationships among numbers and operations and attempts to engage teachers through video lessons, problem-solving activities, and online demonstrations.
   (For more details, see ENC Record.)
   
   
3. Math playground
   Featured in ENC Focus   ENC Digital Dozen Site  
   Date: 2003 Grade(s): K - 6 Cost: Free ENC#: 028219
   This Internet site contains a number of word problems, math games, and logic puzzles designed to help students in grades K-6 practice their skills in mathematics. The activities focus primarily on addition, subtraction, multiplication, and division.
   (For more details, see ENC Record.)
   
   
4. Visual fractions: an online tutorial
   ENC Digital Dozen Site  
   Date: 2004 Grade(s): 4 - 9 Cost: Free ENC#: 016885
   This World Wide Web (WWW) site aims to reduce fraction anxiety, called Fractionitis, in adults and students by helping the user picture fractions and the operations that can be performed on them. There are instructions and problems to work through for the operations of addition, subtraction, multiplication, and division, first using fractions and then working with mixed numbers.
   (For more details, see ENC Record.)
   
   
5. Who wants pizza?: a fun way to learn fractions
   ENC Digital Dozen Site  
   Date: 2000 Grade(s): 2 - 7 Cost: Free ENC#: 027664
   This Internet site for grades 2-7 uses a number of visual diagrams to teach students about fractions. Covering topics such as addition, multiplication, and equivalent fractions, this website provides a variety of questions and activities for students.
   (For more details, see ENC Record.)
   
   
6. Mathematics lessons that are fun, fun, fun!!!
   Featured in ENC Focus   ENC Digital Dozen Site  
   Date: 1998 Grade(s): K - 12 Cost: Free ENC#: 014712
   This World Wide Web (WWW) site is designed to provide teachers with mathematics lessons that they can use online or in the classroom. The fifteen lessons range from those appropriate for primary grades to high school and include topics such as counting, fractions, algebra, geometry, and calculus.
   (For more details, see ENC Record.)
   
   
7. No matter what shape your fractions are in
   ENC Digital Dozen Site  
   Date: 1997 Grade(s): 3 - 6 Cost: Free ENC#: 011987
   This World Wide Web (WWW) site, designed for students in grades 3 to 6, offers four sets of pattern block problems where patterns of colorful tiles are examined to find fractional relationships. The goal is to make students think as they explore geometric models of fractions and discover relations among them.
   (For more details, see ENC Record.)
   
   
8. Mighty mouthwatering math
   ENC Digital Dozen Site  
   Date: 1997 Grade(s): 5 - 8 Cost: Free ENC#: 009990
   This Internet site is an online classroom project intended to supplement the teaching of fractions and decimals. Participating classes predict, collect and analyze data on the number of each color of plain M and M's in a 1.69 ounce bag.
   (For more details, see ENC Record.)
   
   
9. Arithmetic: mastering the operations
   Date: 2004 Grade(s): K - 6 Cost: Free ENC#: 101183
   Sure, 2 plus 2 equals 4, and 4 times 2 is 8, Easy, right? Not so fast. Does it make sense to students why these are the answers? Teachers today want their students to have both computational skills and conceptual understanding of what they're doing and why they're doing it.
   (For more details, see ENC Record.)
   
   
10. Fraction converter
    Date: 2004 Grade(s): 4 - 5 Cost: Free ENC#: 100606
    This online activity features a Java applet that converts fractions to decimals and decimals to fractions. From this page, What, Why, and How buttons take the visitor to information about how to use the applet, where it fits into the curriculum, and links to supporting classroom materials.
    (For more details, see ENC Record.)
    
    
11. Rectangle multiplication: multiplication of fractions (grades 3-5)
    Date: 2003 Grade(s): 3 - 5 Cost: Free ENC#: 100838
    Using this virtual manipulative, the student can multiply fractions with denominators from 1 to 8 and relate the process to an area representation for fractions. Fractions, represented on a grid as part of a whole rectangle, are denoted with red and blue squares, with overlapping purple squares indicating the product.
    (For more details, see ENC Record.)
    
    
12. Fractions (improper): rectangle multiplication (grades 3-5)
    Date: 2003 Grade(s): 3 - 5 Cost: Free ENC#: 100882
    Using this virtual manipulative, the student can multiply improper fractions with denominators from 1 to 8 and relate the process to an area representation for fractions. Fractions, represented on a grid as part of a whole rectangle, are denoted with red and blue squares, with overlapping colored squares indicating the product.
    (For more details, see ENC Record.)
    
    
13. Fractions: parts of a whole (grades 3-5)
    Date: 2003 Grade(s): 3 - 5 Cost: Free ENC#: 100852
    Using this manipulative, the student can observe how a fraction is represented with a model, in a statement, and as a number written with a numerator and denominator. The student selects the number of parts to divide a whole shape and selects the parts to be highlighted to form the fraction.
    (For more details, see ENC Record.)
    
    
14. Fractions: naming (grades 3-5)
    Date: 2003 Grade(s): 3 - 5 Cost: Free ENC#: 100735
    Using this manipulative, the student enters the number of colored parts found in a shape as the numerator, enters the total number of parts as the denominator, and can check to see if the fraction name is correct. If the student enters an equivalent fraction in lowest terms, an automated response indicates that it is correct, but that the student should enter the fraction with the number of parts as the denominator.
    (For more details, see ENC Record.)
    
    
15. Fractions: parts of a whole (grades preK-2)
    Date: 2003 Grade(s): Pre-K - 2 Cost: Free ENC#: 100729
    Students can use this manipulative to observe how a fraction is represented with a model, in a statement, and as a number written with a numerator and denominator. The student selects the number of parts to divide a whole shape and selects the parts to be highlighted to form the fraction.
    (For more details, see ENC Record.)
    
    
16. Fractions: naming (grades preK-2)
    Date: 2003 Grade(s): Pre-K - 2 Cost: Free ENC#: 100728
    Using this manipulative, the student enters the number of colored parts found in a shape as the numerator, enters the total number of parts as the denominator, and can check to see if the fraction name is correct. If the student enters an equivalent fraction in lowest terms, an automated response indicates that it is correct, but that the student should enter the fraction with the number of parts as the denominator.
    (For more details, see ENC Record.)
    
    
17. Melvin's make a match
    Date: 2003 Grade(s): 2 - 6 Cost: Free ENC#: 100512
    This online matching game requires the student to match bottles with labels that are equivalent fractions represented in pictorial or numerical form. The game offers progressively more difficult levels containing more items to match and more difficult fractions to compare.
    (For more details, see ENC Record.)
    
    
18. MathMastery.com
    Date: 2003 Grade(s): 3 - 8 Cost: Free ENC#: 029237
    This Internet site offers three online courses designed to help students in grades 3-8 learn, practice, and understand essential math skills involving fractions, decimals, and statistics. Each course contains several comprehensive lessons that address such skills as simplifying fractions, rounding decimals, and interpreting graphs.
    (For more details, see ENC Record.)
    
    
19. Who's on first today?
    Date: 2002 Grade(s): 6 - 8 Cost: Free ENC#: 100681
    In this activity, students use hits and at-bat data to determine which of two baseball players has a better batting average. The activity is one of 80 mathematical challenges featured on the Figure This! web site, where real-world uses of mathematics are emphasized.
    (For more details, see ENC Record.)
    
    
20. Tan, don't burn: how long before you burn?
    Date: 2002 Grade(s): 6 - 8 Cost: Free ENC#: 100554
    This online activity offers students the opportunity to reason with numbers as they examine the practical implications of sun protection factor (SPF) numbers on sunblock. The activity is part of the Figure This! collection of 80 online mathematical challenges emphasizing real-world uses of mathematics.
    (For more details, see ENC Record.)