RONSAC

Research on Systems and Computations

Educational Games

Tentaizu (Star map)

Enhances math sense on algebra & reasoning (logic). The goal is to locate hidden stars on a board by using clues and uniqueness. Four difficulty levels and four board sizes. Similar to minesweeper, sudoku and kakuro.

Tentaizu is in the class of board puzzles with binary variables. Check out the details on how to play help page. See Wikipedia's article "Board puzzles with algebra of binary variables".

The game is published in Android market:

The full featured version, Tentaizu
The free version, Tentaizu Lite

One to Nine

Trial one to nine

Advanced Mathematics for Elementary Students (4th and 5th Grades)

The following materials on advance elementary mathematics were devloped for the 2008-2009 mathletes program of Del Mar Heights Elementary School, Del Mar, California.

Counting Numbers and Natural Numbers
Decimal Digits
Operations on natural Numbers
Facts on Odd and Even Natural Numbers
Drill Exercises

Factors and Multiples
Divisibility
Some simple rules for Divisibility
Common Divisors and Gretest Common Factor (GCF)
Common Multiples and Least Common Multiple (LCM)
Drill Exercises

Numbers 3: Working with Large Numbers

Factorization and Division
Multiplying Numbers with Zeros at Their Right
Dividing a Number with Zeros at Its Right by Another Number
Dividing Numbers with Zeros at Their Right
Drill Exercises

Numbers 4: Natural and Fractional Numbers

Representations and Values
Containers and Sets
Fractional Numbers
Infinity
Drill Exercises

Introduction
Properties of Equations
Examples on SOlving Equations
Drill Exercises

Drill Exercises

Drill Exercises

Drill Exercises

Drill Exercises

Mixed math test 1

Mixed math test 2

Problems and possible solution cases: an introduction

Sequences and series: an introduction

Drill Exercises on one and two dimentional sequences

Applications: distance, time, and speed

Introduction
Drill Exercises

Application: mapping and cryptography