Proportions in crossing lines cut by two parallel lines Student activity Play

Proportions in crossing lines cut by two parallel lines Whiteboard exercise Play

Radioactivity Animation Play

Radioactivity Student activity Play

Radiocarbon method and scintigraphy Animation Play

Radiocarbon method and scintigraphy Whiteboard exercise Play

Radiocarbon method and scintigraphy Student activity Play

Rate equation and order of reaction Student activity Play

Rational numbers and geometric series Student activity Play

Rational numbers and geometric series – example Animation Play

Recursive definitions Student activity Play

Reducing a fraction to lowest terms Animation Play

Relationship between division and multiplication Student activity Play

Relationship between Kp and Kc Student activity Play

Rule for the nth term of a sequence Student activity Play

Rule for the  nth term of a sequence Whiteboard exercise Play

Salt hydrolysis Whiteboard exercise Play

Salt hydrolysis Student activity Play

Salts of weak acids and strong bases Student activity Play

Salts of weak acids and strong bases Whiteboard exercise Play

Salts of weak acids and weak bases Student activity Play

Salts of weak acids and weak bases Animation Play

Saving money Whiteboard exercise Play

Second-order reactions Whiteboard exercise Play

Second-order reactions Student activity Play