The class gives the frog orders, such as "forward 8, back 3". The frog hops along the lily pads one mark at a time, and everyone can count the hops.
Number line
Game
✓ Saved for offline use. You can also install it as an app from the browser menu.
Teacher tips and shortcuts
To give an order, tap the number, then Forward or Back. Add up to six orders, then press Go!. Forward hops go to bigger numbers, back hops to smaller ones.
The frog makes one hop for each mark, so "forward 0.3" on a tenths line is three small hops. Ask the class to count along.
Jumps are drawn over the pads with their size, and the sum is written at the top: 2 + 8 − 3 = 7.
If an order would take the frog past the end of the line, it falls in the water and climbs back to where that order started.
In Where will it land?, tap a number to mark the class's guess before pressing Hop!. In Free hopping, tap a number to move the frog there.
Keyboard: type numbers, → or + for forward, ← or − for back, Enter to go, Backspace to undo, F full screen, M sound, Esc this menu.