Subtraction Fiesta

Subtraction Fiesta is a curriculum based application, oriented on developing mental calculation strategies for subtraction. The objective is to make it super easy to use in a classroom environment and it can be easily integrated in a primary school curriculum.

This game is also part of google Indie Game developer contest. We try to present an innovative way to learn with educational game , and change something not fun ( subtraction) , into a fun and exciting learning experiment.

We focus on three features:

1. We develop mental math strategies for subtraction with a kind of single player campaign .

2. We develop word problems games so kids understand subtraction.

3. We develop a multiplayer gaming interface to play tournament, friendly competition with subtraction. The objective is to bring excitement in the classroom and peers to peers self motivation.

It's just a few words to describe the app .

You will be able to download the game manual with the full description here.

You can also read more about it on the google playstore :

https://play.google.com/store/apps/details?id=com.MatthiasGuichard.SubtractionFiesta

Google play Leaderboard and achievements.

Designed for kids.

Languages friendly, easy to switch between french and english.

Quick and easy to use specific contents.

Explanations to guide/help the player .

Single player mode: correct instantly

Advanced levels.

Multiplayer tournament.

Here it is a sample of the table of contents.

Subtract One-Digit Numbers from One-Digit Numbers without regrouping.
Subtract One-Digit Numbers from One-Digit Numbers without regrouping.
Subtract One-Digit Numbers from 10.
Subtract One-Digit Numbers from Two-Digit Numbers without regrouping.
Subtract One-Digit Numbers from Two-Digit Numbers with regrouping.
Subtract One-Digit Numbers from Two-Digit Numbers with regrouping.
Subtract One-Digit Numbers from Two-Digit Numbers with/without regrouping.
Complete to the next Tens.
Subtract 10.
Subtract and think about 8-2.
Subtract and think about 9-5.
Subtract and think about 6-3.
Subtract and think about 7-4.
Subtract and think about easiest calculation.
Subtract Tens and think about easiest calculation.
Subtract Tens and think about easiest calculation.
Subtract two multiples of 10.
Subtract one multiple of 10 from Two-Digit Numbers.
Subtract one multiple of 10.
Compare subtractions.
Subtract One-Digit Numbers.
Subtract and think about 17-4.
Subtract in two parts.
Subtract 9,11.
Subtract Two-Digit Numbers from Two-Digit Numbers without regrouping.
Subtract 19,29.
Subtract 18,28.
Subtract and use decomposing in a difference.
Complete to 100.
Complete to the next Hundreds.
Subtract 100 from Three-Digit Numbers.
Subtract two multiples of 100.
Subtract one multiple of 100 from Three-Digit Numbers.
Subtract Three-Digit Numbers from Three-Digit Numbers without regrouping.
Subtract and use decomposition from Three-Digit Numbers.
Subtract 99,199,299.
Subtract 98,198,298.
Subtract 101,201.
Subtract and use the decomposition in a difference.
Subtract and use the decomposition (+).

it will display a star for each level the kid made with all correct answers.

It is easy to check which strategies the kid need to work on.

Instructions are straight forwards. For kindergarten, you need to click on animals. For primary school kids, you write the calculation 'answer on the calculator and press "OK" to check the answer. If the answer is correct, you move to the next question and you win stars as you progress. if you write a incorrect answer, the robot tells you it, and you are blocked until you find the correct answer. It is voluntary so kids cannot just click everywhere to pass the level.