der Schulweg
route to school
The route that schoolchildren travel every day to get from home to school and back again.
Viele Kinder legen ihren Schulweg gemeinsam mit Freunden zurück.
Many children travel their route to school together with friends.

route to school
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route to school
The route that schoolchildren travel every day to get from home to school and back again.
Viele Kinder legen ihren Schulweg gemeinsam mit Freunden zurück.
Many children travel their route to school together with friends.

The word is simply made up of 'die Schule' (school) and 'der Weg' (way/path). So it very directly describes the way to school.
Mein Schulweg war früher sehr kurz, ich musste nur über die Straße gehen.
My route to school used to be very short; I only had to cross the street.
When describing that something happens during the journey to school, you almost always use the preposition 'auf'. So the phrase is 'auf dem Schulweg' (on the way to school).
Auf dem Schulweg hat es angefangen zu regnen.
It started raining on the way to school.
Common verbs in this context are 'den Schulweg zurücklegen' (to travel one's route to school) or 'sich auf den Schulweg machen' (to set off for school). The route is also often described with adjectives such as 'sicher' (safe), 'gefährlich' (dangerous), 'kurz' (short), or 'lang' (long).
Die Gemeinde möchte den Schulweg für die Kinder sicherer machen.
The municipality wants to make the route to school safer for the children.
way back
'der Rückweg' and 'der Schulweg' can both describe a route that someone travels. 'Rückweg' generally means the way back from a destination to the starting point. It can be after an outing, an appointment, or a shopping trip. 'Schulweg' is more specific: it means the daily route that schoolchildren take to school and back home again. The words can be confused when a child is going back from school. In that case, this route is a 'Rückweg', but also part of the 'Schulweg'. If it is generally about going back, 'Rückweg' fits. If it is about the route to school or from school back home, 'Schulweg' fits.

Der Schulweg der Kinder führt an einer viel befahrenen Straße vorbei.
The children's route to school passes by a busy road.
Der Rückweg vom Amt dauerte länger als geplant.
The way back from the government office took longer than planned.