The idea here is to count jumps as well as objects – using number lines and number boards (e.g. 100 boards). One way to begin this is to count steps and this leads to games and activities that use number tracks. However, the number line places numbers at the ends of steps while the number track has numbers in the spaces. Therefore, a number ladder (like a track but numbering the lines) can be a useful intermediary (see section 2.4.3).