DarTutors

The Lessons in Chapter 3

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• Counting in Groups of 10

• Naming and Writing Numbers 

• The “Teen” Numbers 

• Building Numbers 11-40

• Building Numbers 41-100

• A 100-Chart 

• Add and Subtract Whole Tens

• Practicing with Numbers 

• Which Number Is Greater?

• Numbers Past 100

• More Practice with Numbers

• Skip-Counting Practice 

• Bar Graphs 

• Tally Marks 

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PLACE VALUE

Shark Pool Place Value
Click on the number shown by the ten-stacks and individual blocks.

Fruit Splat Place Value
Click on the fruit with the number that matches the number of tens and ones which are shown. Choose “medium” level for this game.

Base 10 Blocks
Use base ten blocks to help count and show number values.

Name That Number
Match the number on the fruit to the name of the number.

Number Line
Illustrate two-digit numbers. Draw leaps and click on the line to reveal number tags. Change lines to get to two-digit numbers and more.
 

Lifeguards
Move the boat the correct number of jumps on the number line to save the person.

100-CHART

Count to 99!
Enter the number shown by the colored blocks on a hundred chart.

Give the Dog a Bone
Find the hidden bones on a 100-chart.

Interactive 100-Chart
Choose a color and create pretty number patterns on this interactive chart.

Number Grid Fireworks
Click on the correct square on the number chart to find the hidden fireworks.

Fill in the Missing Numbers–customizable chart
Practice filling in the numbers in order, or by types. Set the “End Number” to 120.

Hundred Chart Game
Answer the questions using the number chart.

Interactive Hundred Chart
Color to see skip-counting patterns.

COMPARING

Number Comparison at Mr. Martini’s Classroom
Click on the < , > , or = sign to be put in between two numbers.

Counting Caterpillar
Click to place the leaves with numbers in the correct order for the caterpillar to munch. First, choose your minimum and maximum numbers (such as 0 and 100).

Order Numbers 1-100 Balloon Pop
Pop the balloons in order from the smallest to the greatest.
 

SKIP-COUNTING

Skip-Count by 2s – Balloon Rise – Washington Monument
Practice skip-counting by 2s and help the hot-air balloons rise to the top of the Washington Monument.

Skip-Count by 5s – Balloon Rise – Empire State Building
Practice skip-counting by 5s and help the hot-air balloons rise to the top of the Empire State Building.

Techno Tortoise
Move the tortoise in steps of 10s, 5s, and 1s on the number line to the target number.

Connect the Dots
Connect the dots by counting by twos.

Octopus Game
Find the shell that contains a number that is 10 more than the given number.

Froggy Hop
Find 10 more or 1 more than a given number.

GRAPHS

Bar Graph Sorter
Sort shapes according to shape or color and fill the bar graph.

Interactive Bar Chart with Questions
Choose a theme and the desired number of intervals for your bar chart, then answer the questions.

Tally Chart
Use the tally chart to answer 5 questions.

Tally Game
Record the passing cars using tally marks and then enter the totals correctly. There is also a ‘make your own survey’ option.

Interactive Tally Chart and Bar Graph activity
Click on the children to find out their favorite hobbies. Using that information, make a frequency table and a bar chart.
 

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