Apps to Practice Math Skills
Apps to Use for Teaching and Lessons  Multiple Uses
Virtual Manipulatives
This app provides fraction bars that can be manipulated to practice skills in fractions. Consider asking students to take a screenshot as they work with the app.
Skills: Fractions, Decimals 
TableTots
_Teachers can use this app to build lessons and it provides various "table tops" with manipulatives including:

HandsOn Base Ten Blocks
_"When first learning place value, blocks can be set to represent ones,
tens and hundreds. Later, to introduce decimals, blocks can be set to
ones, tenths and hundredths.
Topics: Whole Numbers Reading and Writing Numbers Decimals Addition and Subtraction Regrouping" VPP .99 
HandsOn Math Hundreds Chart
_"Using HandsOn Math: Interactive Hundreds Chart students can develop the following important mathematical concepts:
SkipCounting Number Patterns Multiplication and Division Facts Prime and Composite Numbers Least Common Multiple Divisibility of Numbers and more..." VPP .99 
Apps to Create Tutorials
ShowMe
_Users use this app create short tutorials and share these with others.
Creates a screencast that includes drawing, images from the photo library, and voice recording.
Acting Out a Problem  Students can act out mathematical, scientific, or social problems to improve their comprehension. 
Educreations Interactive Whiteboard
This extremely versatile app can be used to create a tutorial. The finished video can be uploaded to a website or emailed. The features include adding a photo from DropBox as well as the camera and photo gallery.

Drill and Practice Games and Activities
Math Critters
From 1 player, arcade style, 2 player, and adventure style, this app helps students practice basic math facts and mental math in addition, subtraction, multiplication, and division.
VPP .99 
Grow Your Garden
Uses logic and problem solving skills  over 30 levels practicing addition and subtraction
VPP .99 
Math Bingo
Practice skills in Addition, Subtraction, Multiplication and Division with 3 difficulty levels.
Very fun for students with "game breaks" VPP .49 
PopMath
"PopMath is a fun game for kids of all ages to practice basic math.
Pairs of bubbles float on the screen and your goal is to pop each pair. For example, one bubble says "7" and another says "3+4". Simply touch one bubble and then the other to pop them both. At any time, you can choose different operators: addition, subtraction, multiplication and division. Once you've popped all pairs on a level, you see your time for that level and can move on to the next level, or keep practicing that level. New levels increase the numbers shown in the bubbles, up to 1000 for addition/subtraction and 20 for multiplication/division. PopMath rewards your child with fun sounds and endoflevel animations to make the experience fun." VPP .49 
Math Board
One of the best apps for basic skills practice. Features include:
MathBoard features:  Random problem generation (up to 250 questions per quiz).  Addition, Subtraction, Multiplication, Division, Squares, Cubes and Square Roots  Number ranges are configurable from 9999 to 9999, including the ability to require certain numbers to be in each problem.  Intelligent "wrong" answer generation makes guessing more difficult. Includes the ability to omit negative answers.  A quiz can be timed, and timing can be set as a countdown timer or elapsed time.  A quiz can be saved making it simple to replay a similar quiz or the same quiz at a later date.  Wrong answers are reviewable with both the incorrect and correct answer visible (and equation displayed). You can even generate a quiz from just the wrong answers.  Problem Solver for Addition, Subtraction, Multiplication and Division will explain the required steps to solve these types of problems.  Quick reference math tables for Addition, Subtraction and Multiplication. VPP 2.49 
Math Evolve
Math Evolve is another app for student to practice multiplication, division, addition, and subtraction. This app is engaging, cutomizable, and has several levels for differentiation.
VPP .99 
FlashToPass
_Timed practice, very simple interface
Addition, Subtraction, Multiplication, Division, and Mixed sets. Six levels of difficulty per mathematical operational. 24 additional card sets for practicing particular math fact sets, such as "two's" in addition, ranging from 1 to 24. Randomly generated card sets. Free 
Math Monkey
Fun game as students practice basic math facts
VPP 1.49 
Add the Cards
This app helps students develop their mental math skills. "You have four cards and a number. Your mission is to use +  x / to get the number from these cards. How quickly can you do it?"
VPP .49 
Numbers League
"The Numbers League app is an incredibly fun way to practice your basic math facts. The combination of arithmetic and wacky comic bookstyle superheroes will draw in even the most reluctant child. My kids beg to play this game. The app is also a perfect electronic representation of the original Numbers League card game. I recommend this to anyone from age 5 to adult. Kids aren't necessary to enjoy this challenging game."
 GeekDad, Wired.com" VPP 1.99 
Balloon Pop Challenge
"Each student's grades are tracked in their own grade book. See your high grade next to each challenge so you know how well you are doing. Practice challenges with increasing difficulty or perfect your favorite levels over and over again. . Kids will love this learning game, and will keep improving until they achieve an A on every challenge! Additionally, cumulative scores and overall high scores are tracked so that multiple players can compete to get a high score.
Math challenges cover the following areas: •Addition •Subtraction •Multiplication •Division •Multiples •Factors •Colors" VPP .99 
Long Division
This app has great reviews and seem to be a great way for students to learn complex, multistep computation.
Also check out Long Multiplication VPP 1.99 
Math Drills
_Basic math skills in addition, subtraction, multiplication and division.
 FEATURES   Students have their own personalized settings, scores and test history.  Smart Drills(tm) places emphasis on problems answered incorrectly and/or slowly.  Explore solutions to problems using number lines, wooden blocks, facts and hints. Solve ninetimes problems using your fingers!  Visually track student progress with accuracy and speed graphs. VPP .99 
Sums Stacker
_Sums Stacker is a wonderful math game that challenges kids to stack dice, coins, digits, etc. so their sum equals given numbers.
VPP .49 
Math Magic
"Math Magic uses a combination of your choice of vibrant colours, simple interface and a reward system of stars to encourage and teach kids between the ages of 3 and 8. It’s really easy to use. The child simply has to tap on an answer to solve the problem. Whether they get the answer right or not, a real voice expresses appreciation for the child choosing a response."
VPP .49 
Rocket Math
_Practice all kinds of math skills with 56 different “missions”
▸ Numbers ▸ Fractions ▸ Decimals ▸ Counting ▸ Telling Time ▸ U.S. Money ▸ Shapes (2D and 3D) ▸ Patterns ▸ Addition ▸ Subtraction ▸ Multiplication ▸ Division ▸ Square Roots ...and many more! VPP .49 
Topit Addition
_"Players take turns drawing two cards, finding their sums, and then comparing the sums. Players score points for correctly finding their sum, identifying the greater sum, and for having the greater sum."
You can also download the app that practices SUBTRACTION. 
Beat the Computer  Multiplication
"Practice and reinforce basic multiplication facts (0–10)"

Math Baseball  Multiplication
"Two players, representing 2 teams, play a 3inning baseball game as they practice their 1–12 multiplication facts."

Master the Math
_Master the Math" is an educational game to help students prepare for
Virginia's Standards of Learning (SOL) exams with a focus on the
mathematics curriculum from grades 38

Name That Number
"McGrawHill’s Name That Number game offers a fun and easy way to practice computation and order of operations. "

Divisibility Dash
_"Quick and easy way to practice recognizing multiples of a number and applying divisibility tests"

TricTrac  Addition Facts
"Players take turns rolling two dice, finding their sum, and then matching the sum to one or more numbers in their hand. Every match eliminates that number or numbers from a player’s hand and reduces their score. Players try to eliminate all the numbers in their hand. "

Fractions and Decimals
Fraction Monkey
This app has 40 levels. Practice addition, subtraction, multiplication, and divsion problems with fraction.
VPP .99 
Fraction Math
This app helps students learn about fractions and will give the students hints until they get the answer correct. It includes the following features:
Teaches elementary level math about:  what are Fractions  what are Proper and Improper Fractions  what are Mixed Numbers  converting Mixed Numbers into an Improper Fraction VPP .99 
Understanding Fractions
Provides step by step videos and a quick check after each video.
FREE 
Motion Math
"Motion Math, learners improve their ability to perceive and estimate fractions in multiple forms."
VPP .99 
Equivalent Fractions
"Features of Equivalent Fractions:
 Fraction cards contain visual representations of fractions  Ability to compare fraction cards by clicking and dragging  Practices fraction concepts and relationships  Correct and incorrect answer feedback" 
Number Line
_Number Line is an educational game app to help students learn about fractions, decimals, and percents by ordering equivalent fractions, decimals, and percents on a number line.
Free 
Sketchpad Explorer
"Sketchpad Explorer includes iPad®specific activities and workbooks for:
• elementary mathematics (Grades 16) • early algebra (Grades 79) • geometry (Grades 910) as well as full access to many mathematical documents hosted on the Sketch Exchange community site and across the web. Users of The Geometer’s Sketchpad can also create and share documents with and for their iPad using iTunes® File Sharing." Free 
Jungle Fractions
"Tutorials for beginners
● Name, compare, and add fractions visually ● Convert fractions between improper and mixed format ● Score tracks progress" VPP 1.49 
Pizza Fractions
Basic Fraction app, match numeric fractions with pictures
FREE Basic Conversions
_"reducing simple fractions and finding equivalent fractions with the aid of pizza picture examples"
VPP .49 Comparing Simple Fractions
"comparing simple fractions using pizza picture examples"
VPP .49 
Portion Platter
"Portion Platter (Fractions) helps students better visualize fractions and percentages and equivalent relationships between them. The touch mechanic engages children in a handson learning process, implementing kinesthetic learning. Two types of problems are presented at 4 different difficulty levels appropriate for grades 26.
The basic idea of Portion Platter is enable children to better visualize fractions." FREE 
Telling Time and Practicing Money Apps
Jungle Time
"Tutorials for beginners
● 3 clock styles: Standard, Learning (with hours and minutes), and Classic (with Roman numerals) ● Clock hands move like a real clock ● Doubleclock math problems ● Learn with 12 or 24 hour clock notation ● Score tracks progress" VPP 1.49 
Counting Bills and Coins
"Counting Bills & Coins lets you practice identifying and solving math problems with money. Count, match, and make change with coins up to quarters and bills up to $20. Practice money skills in five unique activities:
(1) Counting Money: Type the total of the coins and bills you see. (2) Show Me the Money: Drag bills and coins to make the total shown. (3) Making Change: Drag bills and coins to give customers change for their purchases. (4) Matching Amounts: Make the amount shown by using a different combination of bills and coins. (5) Show Values: Drag coins and bills to count up, and then check your answer." FREE 
Coin Math
"Learn how to recognize, count, add and make change with U.S. coins.
Teach your kids how to:  Learn what a penny, nickel, dime, quarter, half dollar and dollar coins looks like, front and back.  Learn about U.S. State Quarters.  Learn how to match coins.  Learn how to add coins.  Learn how to add different coins.  Learn how to pay for items.  Learn how to make change." VPP .99 
Counting Money
"designed to help people of all ages count money"
FREE 
Math Tappers Apps  developed with a Math Teacher (all free)
Math Tappers Blog can be found here for more information.
Math Tappers  Numberline
_ "This game allows players to develop their understanding of our number
system and their proportional reasoning skills by giving them an
opportunity to consider the relative positions of whole, integer and
real numbers on a numberline."

Math Tappers  Find Sums
"Find Sums is designed to help learners to master basic addition and subtraction facts with understanding and then to encourage them to continue playing to develop efficient strategies and eventually improve their recall speed (fluency)."

Math Tappers  Multiples
"Multiples is a simple game designed first to help learners to make sense of multiplication and division with whole numbers, and then to support them in developing fluency while maintaining accuracy." 
Math Tappers  Clockmasters
"Clockmaster is a game to help children make the connection between hours and minutes and to help them become fluent in both reading and setting time on digital and analog clocks."

Math Tappers  Estimate Fractions
"Fraction Estimation is designed to help learners to build their intuitive understanding of fractions by helping them to relate fractions (both symbols and pictures) to the nearest half (e.g., 0, ½ 1, 1½, 2, etc.) and then to extend their understanding by challenging them to use fraction estimates in addition and subtraction problems. Learners should be able to master the challenges in this app before moving on to formal operations with fractions."

Math Tappers  Equivalents
"Equivalents challenges players to find groups of tiles (pairs or triples)
showing equivalent fractions, decimals and/or percents. To assist the player, the game can display a numberline, a 100grid or a pie chart showing the value of the initial fraction selected." 