Math Learning Tools for Number Sense (K-8)

This page contains online tools for teaching Number Sense at the elementary level.

Number Sense Tools
Tool Grades
Lets Count!
Interactive counting activity for young students. (Rice University)
Five Frame
Students practice counting and adding to 10. The frames help students think of numbers in relation to 5. (NCTM Illuminations)
Ten Frame
Students practice counting and adding to twenty. The frames help students think of numbers in relation to 10. The tool offers four variations and the option for students to check their answers.(NCTM Illuminations)
This applet can be used to compare counting sequences on a calculator with the patterns they generate on a hundred board. For more information on its use see Using Calculators and Hundreds Boards. (NCTM Illuminations)
Students play a game like Concentration and match cards that show different representations of the same numbers. One or two students can play using the numbers 1-6, 1-10, or fractions. (NCTM Illuminaitons)
Bobbie Bear
This interactive math appletcan be used to explore math and create interactive lessons. Bobbie Bear is planning a vacation and wants to know how many outfits can be made using different colored shirts and pants. (NCTM Illuminations)
Electronic Abacus
This interactive math applet from Illuminations can be used to explore math and create interactive lessons. Students explore the use of an abacus model for representing numbers and for performing addition. (NCTM Illuminations)
Money Flashcards
Provides electronic flashcards to test students ability to add coins and notes and see how much money they have. (A+ Math)
Math Flashcards
This website provides interactive flashcard exercises for all types of mathematical operations. The site also provides a flashcard creator for printing your own set. (A+ Math)
Multiplication: An Adventure in Number Sense
This interactive grid, from Natural Math, helps students develop a conceptual understanding of multiplication. Students click on one number from the left column and one from the upper row, then click on the equal sign in the upper right corner to see a representation of the total of the two numbers multiplied. Fro more information see the Resource Review.

Equivalent Fractions

Students to create equivalent fractions by dividing and shading squares or circles. The fractions are simultaneously displayed on a number line so students can see the relationship between the fractions. (NCTM Illuminations)
Fraction Track
Mathematical game that fosters mathematical communication as students explain and justify their moves to one another and engage in thinking about and applying concepts and skills. The first part provides students with opportunities to think about how fractions are related to a unit whole, compare fractional parts of a whole, and find equivalent fractions. The remaining three components of the resource give teachers the opportunity to reflect on student learning with the interactive game. (NCTM Illuminations)

Fraction Pie

Allows students explore several models for representing fractions with adjustable numerators and denominators, including a circle model, a rectangle model, and a set model.(NCTM Illuminations)
Squares and Circles
Starting with a sequence of squares and circles, the players choose pairs of objects which are removed according to predetermined rules, with the object of removing the last shape. The user may select the number of shapes, which increases the difficulty, or the user can allow the computer to randomly select the number of shapes.In order to get the most benefit from the activity, a teacher will probably want to have students play the game and then discuss the strategies they discovered. While the explanation that is provided is far too abstract for students at this level, it may help the teacher better guide the discussion in fruitful directions.