Computation Estimation

The NCTM Principle and Standards of School Mathematics (2000) defines computational fluency as having efficient, flexible and accurate methods for computing. The key thing to note is that it does not say compute using paper and pencil methods.  Students need to be fluent in mental math, paper and pencil methods and using technology such as a calculator in computing answers to situations involving numbers (both whole numbers as well as fractions and decimals).

Fractions with Mult. Table

Use the Multiplication Table to illustrate equivalent fractions and simplification of fractions.

Fractions with Pattern Blocks

An interactive lesson with ordering single digit numbers, even and odd numbers and Less Than/Greater Than 

Flying High Facts

Test your Multiplication facts with this interactive balloon flying basic skills practice.

Find the Missing Number

Use the detective’s Magic Glass to reveal the answers to the Missing Number problems in this program.

Napier’s Bones

This lesson uses the interactive capability of the Smartboard to illustrate how John Napier used the ivory bones to aid in computation.  Page included for a printout for each student.

Integer Addition

Use the concept of creating zero pairs to illustrate to students the addition of positive and negative integers.  May be utilized as a class demonstration while students are working with the manipulatives at their desks

Featured Lessons Computation

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Teq Fraction Slider

This gives students a visual representation of equivalent fractions. Fraction groups are highlighted as the bar slides across the page.

Froggy Fractions

An interactive lesson using rulers to visually represent the addition of numbers and fractions.

Hit the Target

Students quickly try to determine which of the target numbers will add or subtract to get the target number.  Great mental math game.

Integer  Multiplication

Use a grid to illustrate the multiplication of two integers.  The grid gives a visual representation of the sign given to the multiplication of two integers.  Use random numbers or select numbers of your own to place on the grid.

Algebra Ten Tiles
The student uses each of the Ten Tiles once and only once to complete the algebra problem solving activities.  Five different activities with directions on making your own.

Penguin Fact Families

Use these different size penguins with your students to make fact families.  This file is just a file to make the fact family not a lesson with fact families.

Interactive Number Line

This lesson illustrates on the number line the addition and subtraction of whole numbers.  An excellent introduction for young students to addition and subtraction using the number line.  The number line can be moved to illustrate negative numbers

Lego Fireman Number Line

This number line lesson makes a connection to a car going forward for positive and backward for negative. The answers appear in the Fire Chief’s hat as his car moves along the Fireman Number Line

Teaching Lattice Mult.

This lesson is for the initial instruction of how to use lattice multiplication as an alternative to the traditional algorithm of teaching multiplication.

Bowling with Aunt Sallie

Roll the three dice and use order of operations to knock down the pens by making a math sentences with answers of 1 through 10.  Excellent game for individual, team, or class  computation skills.

Target 24

Add, subtract,multiply, and divide using 4 random numbers in this computation game to hit the target and score 1, 2 or 3 points.

Can be used with 4 teams or players with a score board for each

Roll Once, Roll Twice

This lesson uses the interactive dice of the Smartboard to engage the students in an addition and subtraction activity. 

Mending Broken Hearts

Similar to the Missing Number lesson but with a Valentine theme.  Students arrange the broken hearts to complete the fact family.

Ten Tiles II

Same concept just presenting the problem in a different way.  The tiles you fill in are the answers for the statements presented.  More of a recall answer than problem solving.

Ten Tiles K-2

An example of Ten Tiles that can be made appropriate for K-2 students.  A template included so you can make your own.

Ten Tiles

The student uses one each of the Ten Tiles to complete the various problem solving activities.  Various computation and numbers sense pages in this file.

See Ten Tiles III in Algebra

Lattice Multiplication

Multiple screens that utilize the concept of Lattice Multiplication as an alternative strategy for multiplying 2 and 3 digit numbers.

Jack and Jill

A cute little lesson that uses visuals to represent how we round off numbers.  The ball does not roll down the hill on its own you have to pretend it does and then determine where it will land.

Fractions with  Rulers

Addition and subtraction is a linear function. Learn how to use two rulers to illustrate the addition and subtraction of whole numbers and fractions.  This is a teacher directed lesson with students working with rulers at their desk

Fat Cat Families

Let the Fat Cat Family help you with the Fact Families.  Several problems are pre-made with a page available to make your own Fat Cat Facts


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Lesson Added



Have you seen Lattice Division?

Types of Fractions

A short lesson on fraction types, proper, improper, mixed number, and equivalent.  An original double spinner at the end that engages the student to create a fraction and declare its  type.

Lattice Division:

Lattice Division is an alternative method for long division.  It uses similar grids that students have used with Lattice Multiplication.  Like Lattice Multiplication it breaks the procedure down into single digit facts.