Edu
 

Mathematics

Number Systems :   Number Flashcards | Counting Pages | Number Recognition Sheets | Number System Conversions | Convert from Roman to Arabic | Number Rounding | Convert hex, decimal, octal, binary | Perform hex, decimal, octal, binary math
Baby Math :   Visual Addition | Visual Subtraction
Time :   Reading the Time | Drawing the Time | Clock Flashcards
Money :   Skip-Counting Change
Basic Math :   Addition | Subtraction | Multiplication | Division | Mixed Operations | Operations with parenthesis
Multi-Digit Operations :   Multi-Digit Addition Skills | Multi-Digit Subtraction Skills | Multi-Digit Multiplication Skills
Calculator Skills :   Calculating with Integers | Calculating with Decimals
Fractions :   Fraction Shapes | Filling Fraction Shapes | Shaded and Unshaded Parts | Comparing Fraction Shapes | Fraction problems
Sets and Venn Diagrams :   Venn Diagram
Decimals :   Decimal Addition | Decimal Subtraction | Decimal Multiplication
Percents :   Percent of Change | Adding Taxes | Applying Discounts | Applying Taxes and Discounts | Quantities with Taxes
Geometry(Planimetry) :   Cube | Tetrahedron | Octahedron | Standard Graph Paper | Axis Graph Paper | Locating Points | Coordinate Shapes | Coordinate Plotting: Shapes | Counting Area | Pythagorean Triples | Recognize a regular polygon | Regular polygon properties | Circles | Ellipse | Types of Quadrilaterals
Geometry(Stereometry) :   Remarkable surfaces | Regular polyhedra | Quadric surfaces
Polyhedra Models :   Cube | Tetrahedron | Octahedron
Graph Paper :   Standard Graph Paper | Axis Graph Paper
Measurement :   Choosing the Best Units
Exponents and Radicals :   Scientific Notation | Power Rules | Radicals Simplifying | Simple Exponents | Simplifying Exponential Expressions
Factorial :   Factotial
Factoring :   Factoring Numbers | Diamond Problems | Factors and Multiples
Pre-Algebra :   Basic Operations With Negatives | Simplifying Expressions | Solving Binomials | Using Division | Using Multiplication | Multiplication & Division | Variable on One Side | Variable on Both Sides | With Parentheses and Multiplication | Eliminating Denominators | Using Distributive Property | Mixed Problem Types | Polynomials | Roots of a polynomial | Operations with Polynomials | Systems with 2 variables | Quadratic equation | Equations with fractions | Equations with fraction 2 | Equations with fractions 3 | Slopes and Types for lines | Trinomial | Binomial | Sum of Two Cubes | Difference of Two Cubes
Quadratic equation :   Quadratic equation parameters | Second-Degree Equation | Solve it by factoring | Algebra, Equation, Solving
Graphs :   Line Graph | Quadratic Graph | Locating Points | Coordinate Shapes | Coordinate Plotting: Shapes | Idenitfying Graph Types
Puzzles :   Math Problem Search | Math Tables | Magic Squares
Statistics :   Combinations, Variations and Permutations
Linear Algebra :   Inequalities | Linear Algebra (equations)
Precalculus :   Exponential behavior | Exponential Function | Rewrite equations in logarithmic and exponential form | Evaluate logarithmic and exponential equations | Solve logarithmic and exponential equation for the variable
Probability :   Probability
Trigonometry :   Calculate trigonometric values | Trigonometry Formulas | Radian and degree | Angles value given in radians | Trigonometric value of the angles in degrees | Calculate the sine of an angle
Logarithms :   Logarithms
Limits :   Determinate Limits | Indeterminate Limits
Integral :   Integration – Simple example | Trigonometric polynomials

Music

Classical :   FUR ELISE
Jazz :   Cool Blues
Christmas :   JINGLE BELLS | Silent Night

Geography

Europe :   Europe Countries
USA :   USA States

Chess

Best move | Find GM move | Quick checkmate | Mate in 1 | Mate in 2 | Mate in 3 | Mate in 4 | Mate in 271 | Make a draw | Indicate the result

Double attack | Double check | Pin | Skewers | Fork | Knight Fork | Luring-Decoy | Clearance | Discovery | Discovered attack | Diversion | Eliminating the defence | Perpetual Check | Stalemate | Queen sacrifice | Sacrifice | Attack Castle | Attack on the king | Mating with queen | Zugzwang | King and pawn ending | Pawn ending | Eighth-back Rank | Rook endgame | Endgame strategy | Passing Pawn | Mixed

Opening | Middlegame | Endgame

TagIT

 

Science

Chemistry

Mendeleev's Periodic Table
Show Elements List | Show Elements Table

Chemistry worksheets
Number of free electrons | Amino acid | Nucleobases | Hydrocarbon

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