The parallelogram rule Student activity Play

The parallelogram rule Whiteboard exercise Play

The percentage composition of dinitrogen oxide Animation Play

The percentage of biogenic elements in the human organism Illustration Play

The pounds and the kilograms Whiteboard exercise Play

The precision of the mid-ordinate rule Chart Play

The processes involved in the nitrogen cycle Whiteboard exercise Play

The properties of β radiation Student activity Play

The reaction between nitrogen and hydrogen Animation Play

The reasons for the flow of induced current Animation Play

The relationship between partial pressure and molar fraction Animation Play

The rule for the sum of a convergent geometric series Whiteboard exercise Play

The rule for the sum of a convergent geometric series Student activity Play

The rule in the general form Student activity Play

The sequence and its terms Whiteboard exercise Play

The similar terms marked wrong Whiteboard exercise Play

The sine rule Whiteboard presentation Play

The sine rule Class activity Play

The sine rule (the law of sines) Student activity Play

The sine rule and construction of a triangle Animation Play

The strength of carbon–carbon bond Animation Play

The strongest organic base Animation Play

The synthesis of organic compounds in an abiotic environment Student activity Play

The synthesis of organic compounds in plants Animation Play

The transformed point's image Whiteboard presentation Play