# 2nd grade Math

## Bridges in Mathematics Grade 2

### Unit 1 – Figure the Facts

__Eye Color__ – Create a virtual picture graph using data on class eye color.

__Favorite Snacks__ – Create a virtual picture graph using data on favorite class snacks.

__Pictograms__ – View a variety of picture graphs and answer the related questions.

__Bonds of Ten__ – Build combinations to ten with pipe sections to set a whale free.

__Catch Ten__ – Catch the base ten blocks that add up to ten.

__Connect Sums__ – Click on values that add up to target sum. Clicked items must be next to each other. Values can be shown as dice, numbers, or money.

__Double Decker Bus__ – Click and drag to put the right number of children on a bus. Windows resemble a double five frame and encourage students to explore combinations to ten. Click “check number” to make the bus go.

__How Many Under the Shell__ – After viewing bubbles under a shell, bubbles are added or subtracted from the total and students must determine how many are left.

__Jet Ski Addition__ – Move jet ski along by solving addition problems. Choose the correct answer from 4 given choices. Play against other online players or the computer.

__Math Lines__ – Race to pair numbers that add up to 10. Or select this version of __Math Lines__ and choose your own target number.

__Number Fact Bingo__ – Choose from 6 bingo games–highlighting a variety of math strands–to use with an entire class. Print the bingo game cards and use an online machine to select the numbers. Combines desktop and online resources.

__Number Twins__ – Find pairs that make 10 (or select any number between 4 and 15).

__Speed Grid Addition__ – Select two numbers from a grid that equal the given sum. Timed. More advanced levels with multi-digit addition are also available: __Speed Grid Addition 2__ and __Speed Grid Addition 3__.

__Speed Grid Subtraction__ – Select two numbers from a grid that equal the given difference. Timed. More advanced levels with multi-digit numbers are also available: __Speed Grid Subtraction 2__ and __Speed Grid Subtraction 3__.

__Subtraction Blast__ – Subtract either 2 or 3 from a number as many times as desired and get to 0 as quickly as possible.

__Sum Sense Addition__ – Drag and drop number cards–with unknowns in all positions–to make an addition equation.

__Sum Sense Subtraction__ – Drag and drop number cards–with unknowns in all positions–to make a subtraction equation.

__Sums Stacker__ – Drag values from stack to stack until the sum of each stack equals the target number. Choose from values shown in: dice, numbers, money. Try to make as few moves as possible. Choose from solve or race modes.

__Ann & Addems Dartboard Game__ – Select the number on the dartboard that must be doubled to equal the target number.

__Bridge Doubles__ – Double numbers 1-10 to complete a series of bridge spans.

__Connect Sums__ – Click on values that add up to target sum. Clicked items must be next to each other. Values can be shown as dice, numbers, or money.

__Deep Sea Duel__ – Collect cards that add up to a specified sum. Choose how many cards, types of numbers, and level of strategy.

__Dinosaur Dentist__ – Use knowledge of *doubles plus or minus one* to remove the dinosaur’s bad tooth.

__Number Fact Bingo__ – Choose from 6 bingo games–highlighting a variety of math strands–to use with an entire class. Print the bingo game cards and use an online machine to select the numbers. Combines desktop and online resources.

__Robin Hood Archery Doubles__ – See a number, then click the double on the archery board. Up to 10+10. __Try Robin Hood Doubles Beyond 10__ for doubles greater than 10+10.

__Number Jump__ – Add and subtract on a number line to move a ball and smash flies.

### Unit 2 – Place Value & Measurement with Jack’s Beanstalks

__Base Ten__ – Represent a given number using base ten blocks. The program keeps track of the number of blocks as they are added and shows the progression on a numberline. Drum beat included; may wish to mute sound.

__Partitioning Numbers__ – View a visual model of tens and units and click on the number represented.

__Shark Numbers__ – Given three numbers, look at the base ten pieces and click on the bubble that shows that number. Shark bites the boat if incorrect.

__Shark Pool Place Value__ – Look at the base ten pieces and click on the bubble that shows that number. In this game there are many numbers to choose from.

__Place Value Calculator__ – View a 4-digit target number to make in expanded form. From this link go to “Teachers Toolkit” and then to “Place Value Calculator.” Also see the “Virtual HTU Place Value Cards.”

__Connect Sums__ – Click on values that add up to target sum. Clicked items must be next to each other. Values can be shown as dice, numbers, or money.

__Deep Sea Duel__ – Collect cards that add up to a specified sum. Choose how many cards, types of numbers, and level of strategy.

__Dinosaur Train: How Big Are You__ – Estimate and measure the length of dinosaurs in non-standard units.

__Number Jump__ – Add and subtract on a number line to move a ball and smash flies.

__Catapult Count On__ – Add a single digit to a double digit to jump to the next multiple of ten on a number line and destroy a castle. Pull down on the catapult to adjust the number added on the number line. Check “hide jumps” to use mental math. See __help video__ for demo.

__ICT Numberline Games__ – Site features a variety of number line games.

__Number Line Puzzle: Missing Numbers__ – Place numbers onto a blank numberline to complete a puzzle. (Requires a small annual subscription fee as a TESiboard+ activity.)

__Techno Tortoise__ – Add 2 numbers by moving a turtle along a number line using -1, +1, +5, or +10. Most problems are multi-digit. Site includes a demonstrator tool that could be used by teachers for whole group instruction. In the game mode, 5 correct answers results in a quick non-math, video-like activity.

__Washing Line__ – Place cards in numerical order on a clothesline.

__Doorway Odd and Even__ – Variety of odd and even math games include: pairing shoes, sorting ladybug spots, painting houses by number, selecting odd or even numbered eggs.

__Fish Counting__ – Count by 2s to select the fish that comes next

__Odd or Even?__ – Drag number cards into the appropriate category, odd or even. Could be done individually or as a whole group activity. Levels include: numbers to 10, 30, and 100.

__Saucer Sorter__ – Count numbers in any sequence (count by 2s, 5s, and more) up to 200. The teacher tool allows you to cover numbers or move numbers around in a given sequence.

### Unit 3 – Addition & Subtraction Within One Hundred

__Adding 2-Digit Numbers__ – Break two-digit numbers into tens and ones and then add them.

__Base Ten__ – Represent a given number using base ten blocks. The program keeps track of the number of blocks as they are added and shows the progression on a numberline. Drum beat included; may wish to mute sound.

__Connect the Dots: Multiples__ – In these connect the dot pictures, players set the counting sequence. Set the pictures to practice counting by 1s, 5s, 10s, or set your own number to practice multiples.

__Grouping & Grazing__ – Count, add, & subtract to move cows into corrals. Corral in groups of 5 or 10.

__ICT Numberline Games__ – Site features a variety of number line games.

__Saucer Sorter__ – Count numbers in any sequence (count by 2s, 5s, and more) up to 200. The teacher tool allows you to cover numbers or move numbers around in a given sequence.

__Techno Tortoise__ – Add 2 numbers by moving a turtle along a number line using -1, +1, +5, or +10. Most problems are multi-digit. Site includes a demonstrator tool that could be used by teachers for whole group instruction. In the game mode, 5 correct answers results in a quick non-math, video-like activity.

__Whack a Mole__ – Select the number in a counting sequence. Game can be set for any start number and any counting-by sequence.

__Catapult Count On__ – Add a single digit to a double digit to jump to the next multiple of ten on a number line and destroy a castle. Pull down on the catapult to adjust the number added on the number line. Check “hide jumps” to use mental math. See __help video__ for demo.

__Base Blocks Addition__ – Add multi-digit numbers using base ten blocks. Uses Java.

__Base Blocks Subtraction__ – Subtract multi-digit numbers using base ten blocks. Uses Java.

__Base Ten__ – Represent a given number using base ten blocks. The program keeps track of the number of blocks as they are added and shows the progression on a numberline. Drum beat included; may wish to mute sound.

__Comparing Numbers__ – Read a prompt and move the correct number(s) into the answer box. Activities include: find 3 odd (or even) numbers, find the smallest or largest odd or even number, put numbers in ascending or descending order, create the largest or smallest number, or choose the number that fits into a given sequence.

__Fridge Magnet Addition Game__ – Add double-digits with unknowns in various positions by dragging magnets on a fridge. Choose timed or not timed versions

__Fridge Magnet Subtraction Game__ – Solve a subtraction problem with unknowns in various positions by dragging magnets on a fridge. Uses 2 digits subtract 1 digit. Choose timed or not timed versions.

### Unit 4 – Measurement

__Inches to Feet__ – Match measurements in inches to their equivalent in inches and feet. Involves mental computation that might be challenging for some students.

__Measurement Mania: U.S. Customary__ – Show conversions between inches, feet, and yards on a sliding number line. Involves mental computation that might be challenging for some students.

__Mathmagician Addition__ – Timed practice with basic addition facts.

__Yards to Feet__ – Match measurements in feet to their equivalent in yards and feet. Involves mental computation that might be challenging for some students.

__Saucer Sorter__ – Count numbers in any sequence (count by 2s, 5s, and more) up to 200. The teacher tool allows you to cover numbers or move numbers around in a given sequence.

### Unit 5 – Place Value to One Thousand

__Base Ten__ – Represent a given number using base ten blocks. The program keeps track of the number of blocks as they are added and shows the progression on a numberline. Drum beat included; may wish to mute sound.

__Number Sense__ – Arrange 3 digits to create a 3-digit number larger than a given 3-digit number.

__Shark Numbers__ – Given three numbers, look at the base ten pieces and click on the bubble that shows that number. Shark bites the boat if incorrect.

__Place Value Calculator__ – View a 4-digit target number to make in expanded form. From this link go to “Teachers Toolkit” and then to “Place Value Calculator.” Also see the “Virtual HTU Place Value Cards.”

__Coin Box__ – Variety of activities to count, collect, exchange, and make change for coins. From NCTM. Use as a whole group activity until students are familiar with the various features. Also see coin resources from the __U.S. Mint__.

__Coin Combo__ – The player selects coins that add to a target sum before time runs out. This game involves mental math that may be challenging for some students.

__Connect Sums__ – Click on values that add up to target sum. Clicked items must be next to each other. Values can be shown as dice, numbers, or money.

__Saucer Sorter__ – Count numbers in any sequence (count by 2s, 5s, and more) up to 200. The teacher tool allows you to cover numbers or move numbers around in a given sequence.

__Ghost Blasters__ – Blast every ghost that displays a multiple of the number you choose. Game may be set for multiples of any number from 2-20.

__Whack a Mole__ – Select the number in a counting sequence. Game can be set for any start number and any counting-by sequence.

__Doorway Odd and Even__ – Variety of odd and even math games include: pairing shoes, sorting ladybug spots, painting houses by number, selecting odd or even numbered eggs.

__Patch Tool__ – Drag and drop virtual pattern blocks: arrange blocks to create designs, build sequences, or fill in a puzzle (similar to a tangram puzzle).

__Pattern Blocks__ – Use virtual pattern blocks to create designs and patterns and explore area. Click on Instructions for general information, such as how to rotate a block. Or scroll through the activities on the right.

__Polyominoes__ – Use virtual tile to create designs and patterns and explore area. Click on Instructions for general information. Uses Java.

### Unit 6 – Geometry

__Concentration__ – Click on the desired mode to play a game in which you match each shape, array, percent, or fraction visual with its name. The game will play an audio recording of the name.

__Patch Tool__ – Drag and drop virtual pattern blocks: arrange blocks to create designs, build sequences, or fill in a puzzle (similar to a tangram puzzle).

__Pattern Blocks__ – Use virtual pattern blocks to create designs and patterns and explore area. Click on Instructions for general information, such as how to rotate a block. Or scroll through the activities on the right.

__Shape Lab__ – Help a cartoon scientist finish his project by handing him the shapes with the right characteristics. Students will need to be able to read the clues or have a helper read them aloud.

__Shifting Shapes__ – Identify a simple 2D shape hidden on the screen using a small window to look at parts of the shape. Try __Shifting Shapes Year 1__ for additional shapes: hexagon, octagon. Also see __Guess the Hidden Shape__ (TESiboard.)

__Triangle Sort__ – Sort triangles according to their properties.

__Polyominoes__ – Use virtual tile to create designs and patterns and explore area. Click on Instructions for general information. Uses Java.

__Fractions Naming__ – Write the fraction represented by the highlighted part of a shape.

__Let’s Tessellate!__ – Choose a shape and color and watch it tessellate automatically.

__Polygon Playground__ – Drag shapes to explore polygons and create pictures, tessellations, symmetrical objects, and patterns.

__Tessellate!__ – Start with a triangle, rectangle or hexagon. Make alterations to the shape, assign colors, and then watch as a tessellation is created with your shape.

__Tessellations.org__ – This site is devoted to exploring tessellations with young students. It includes galleries of students’ tessellations, background information, and activities.

__Thirteen Ways of Looking at a Half__ – Find 13 different ways to show one-half by highlighting 4 out of 8 congruent triangles that are arranged in a square.

__Fraction Flags__ – Click on an array to paint a flag with specific combinations of halves and quarters.

__Fraction Pieces__ – Choose a square or circle as the whole and then place pieces of different sizes and shapes on the whole to see what fraction each represents.

__Kite Shading__ – Color kites to show given fractions. Demonstrate that fractions such as one-half can be shown in multiple ways.

### Unit 7 – Measurement, Fractions & Multi-Digit Computation with Hungry Ants

__Ant Web in Google Earth__ – Explore ant species around the world.

__ICT Numberline Games__ – Site features a variety of number line games.

__Measurement Game: Centimeters__ – View a red line next to a centimeter ruler and select the correct answer from four options.

__Techno Tortoise__ – Add 2 numbers by moving a turtle along a number line using -1, +1, +5, or +10. Most problems are multi-digit. Site includes a demonstrator tool that could be used by teachers for whole group instruction. In the game mode, 5 correct answers results in a quick non-math, video-like activity.

__Color Spinners__ – Create spinners divided into different colors and watch the results of spinning the spinner a specified number of times.

__Fraction Bars__ – Create fraction bars of different sizes and colors to model fractions.

__Fraction Flags__ – Click on an array to paint a flag with specific combinations of halves and quarters

__Fraction Pieces__ – Choose a square or circle as the whole and then place pieces of different sizes and shapes on the whole to see what fraction each represents

__Fractions Naming__ – Write the fraction represented by the highlighted part of a shape.

__Fractions, Parts of a Whole__ – Model fractions as parts of a whole circle or square. Specify the number of equal parts and then select some of them to model a fraction.

__Amoeba Addition Game__ – Practice adding 3 digits by splitting numbers. Look for title “Addition by Splitting” game.

__Amoeba Subtraction Game__ – Practice subtracting 3 digits by splitting numbers. Look for title “Subtraction by Splitting” game.

__Base Blocks Addition__ – Add multi-digit numbers using base ten blocks. Uses Java.

__Base Blocks Subtraction__ – Subtract multi-digit numbers using base ten blocks. Uses Java.

__Coin Box__ – Variety of activities to count, collect, exchange, and make change for coins. From NCTM. Use as a whole group activity until students are familiar with the various features. Also see coin resources from the __U.S. Mint__.

__Coin Combo__ – The player selects coins that add to a target sum before time runs out. This game involves mental math that may be challenging for some students.

__Dolphin Feed Counting Money__ – Click on coins to equal an amount of money shown in numerical form. Includes collections over $1.00.

__Number Bond Machine__ – Fill in the missing addend to make the sum of 5, 10. or 100. This works well as an “I Have, You Need” game.

__Number Sense__ – Arrange 3 digits to create a 3-digit number larger than a given 3-digit number.

__Sums Stacker__ – Drag values from stack to stack until the sum of each stack equals the target number. Choose from values shown in: dice, numbers, money. Try to make as few moves as possible. Choose from solve or race modes.

__Fridge Magnet Addition Game__ – Add double-digits with unknowns in various positions by dragging magnets on a fridge. Choose timed or not timed versions.

__Fridge Magnet Subtraction Game__ – Solve a subtraction problem with unknowns in various positions by dragging magnets on a fridge. Uses 2 digits subtract 1 digit. Choose timed or not timed versions.

### Unit 8 – Measurement, Data & Multi-Digit Computation with Marble Rolls

__Amoeba Addition Game__ – Practice adding 3 digits by splitting numbers. Look for title “Addition by Splitting” game.

__Amoeba Subtraction Game__ – Practice subtracting 3 digits by splitting numbers. Look for title “Subtraction by Splitting” game.

__Base Blocks Addition__ – Add multi-digit numbers using base ten blocks. Uses Java.

__Base Blocks Subtraction__ – Subtract multi-digit numbers using base ten blocks. Uses Java.

__Compare Numbers__ – Compare numbers and place the correct sign between them. Three levels: numbers to 100, 1,000, 10,000.

__Number Sense__ – Arrange 3 digits to create a 3-digit number larger than a given 3-digit number.

__Mr. Nussbaum’s Graph Master__ – Students create a bar graph, line graph, and pie chart based on data collected from classmates. The program then asks them eight multiple choice questions based on the data entered. Suggested ages: 7-12.

__Eye Color__ – Create a virtual picture graph using data on class eye color.

__Favorite Snacks__ – Create a virtual picture graph using data on favorite class snacks.

__Inches to Feet__ – Match measurements in inches to their equivalent in inches and feet. Involves mental computation that might be challenging for some students.

__Pictograms__ – View a variety of picture graphs and answer the related questions.