Do a quick review of the prepositions that the students should already know (prepositions of place): in, on, under, in front of, behind, between and next to.
Then demonstrate with classroom objects the movement of one object in relation to another. For example, move a pencil towards a drink bottle while repeating the word 'towards', then the complete sentence 'the pencil is going towards the bottle'. Similarly, demonstrate 'away from' and 'past' and 'around'. For 'into' and 'out of', use a schoolbag or other container. Even position the students around the room if possible and instruct them how to move 'Move towards the door', 'go around the table' etc.
The words 'among', 'through' and 'along' can be illustrated with simple pictures (a wolf among sheep, an arrow going through trees in a forest, and a person walking along the shore for example).
After doing plenty of examples and repeating the vocabulary with the students, have them try to complete the crossword. Each picture corresponds to one of the words or phrases in the box.
These are useful words to insert into future lessons to help the students become familiar with them.
1) towards
2) away from
3) against
4) across from
5A) into
5B) in front of
6) through
7) onto
8) past
9) around
10) off
11) along
12A) across
12B) among
13) out of