Leaves and their structure Student activity Play

LED diode (light-emitting diode) Student activity Play

Left-hand rule Student activity Play

Length constructions Student activity Play

Length contraction (Lorentz-Fitzgerald contraction) Student activity Play

Lens equation and magnification Student activity Play

Lenz's Law Student activity Play

Lenz's Law Student activity Play

Less and more probable events Student activity Play

Let us draw a road in the coordinate system Student activity Play

Let us start the game Student activity Play

Let's investigate perimeters and areas Student activity Play

Let's paint our classroom Student activity Play

Letters in algebraic expressions Student activity Play

Letters in equations Student activity Play

Leucocytes – a wide variety of cells Student activity Play

Leucocytes – always ready to fight Student activity Play

Levels of organization in organisms Student activity Play

Levers Student activity Play

Levers Student activity Play

Levers and pulleys Student activity Play

Lewis dot-and-cross diagrams Student activity Play

Lewis theory of acids and bases Student activity Play

Lichens Student activity Play

Lichens (division Mycophycophyta) Student activity Play

Life beyond the Earth Student activity Play

Life cycle of HIV Student activity Play

Life cycle of Schistosoma Student activity Play

Life in the sea Student activity Play

Life on land Student activity Play