This is the 6097th most frequent French word.
eller
The word "eller" does not exist in standard French.
The verb 'aller' is used here to indicate movement/direction, specifically the act of going to the cinema.
Elle préfère aller au cinéma pour voir un bon film.
She prefers to go to the cinema to watch a good movie.
Again, 'aller' reflects the action of going towards an activity or place, in this case, walking.
Quand il fait beau, nous aimons aller nous promener au parc.
When the weather is nice, we like to go for a walk in the park.
'Aller' here is employed to describe the purpose of movement towards the destination of the school.