Completing the perfect square Whiteboard exercise Play

Concentration of hydroxide ions and the pH Animation Play

Construction of the diagrams Simulation Play

Corresponding segments and angles – reflection Animation Play

Counting votes Student activity Play

Decomposing a rational expression into partial fractions Whiteboard exercise Play

Decomposing an expression with a polynomial in the denominator Whiteboard exercise Play

Decomposition of a rational expression Whiteboard exercise Play

Decomposition of a rational expression with an arbitrary denominator Animation Play

Decomposition of a simple rational expression Animation Play

Demonstration or proof? Animation Play

Demonstration or proof? Student activity Play

Derivation of an expression for the mass of substance Animation Play

Deriving the expression for equilibrium constant for ammonia synthesis reaction Animation Play

Deriving the expression for equilibrium constant for ammonia synthesis reaction Animation Play

Deriving the expression for free energy change Animation Play

Determination and differentiation of cells Student activity Play

Difference of squares Student activity Play

Difference of squares Whiteboard exercise Play

Dissociation constants of conjugate acids and bases Student activity Play

Dissociation constants of conjugate acids and bases Whiteboard exercise Play

Dissociation of weak bases Animation Play

Distribution of multiplication over addition Whiteboard exercise Play

Dividing the circle into six equal parts Animation Play

Dividing the segment into six equal parts Whiteboard exercise Play