zyugyou no mae ni, kyouzai wo tukue no ue ni narabete okimasu.

No. In normal Japanese, this would usually be written as:

授業の前に、教材を机の上に並べておきます。

The spaces are often added in learning materials to make the parts of the sentence easier to see. Native Japanese writing normally does not separate words with spaces.

Literally, it is:

• 授業 = class / lesson
• の = links nouns, similar to of or a possessive connection
• 前 = front / before
• に = at / before / in the time frame of

So 授業の前に means before class.

A very literal breakdown would be something like at the time before the class.

In both places, の connects one noun to another.

• 授業の前 = the before of class → before class
• 机の上 = the top of the desk → on the desk / on top of the desk

This is one of the most common uses of の. It often works like of, 's, or a noun modifier in English.

They do different jobs.

1. 授業の前に

   • Here に marks a time point: before class

2. 机の上に

   • Here に marks the place where something is put: onto/on top of the desk

So the same particle can have different meanings depending on context.

机の上に is more specific. It clearly means on top of the desk.

• 机に could sometimes be understood more generally as to the desk or at the desk
• 机の上に makes it explicit that the materials are being placed on the desk’s surface

So 上 helps clarify the exact location.

を marks the direct object of the verb.

Here:

• 教材 = teaching materials / learning materials
• を = marks the thing being arranged
• 並べておきます = lay out / arrange in advance

So 教材を means that the teaching materials are the things being laid out.

Japanese nouns usually do not show singular vs. plural the way English nouns do.

So 教材 could mean:

• teaching material
• teaching materials

In this sentence, English would most naturally say teaching materials, because arranging multiple items on a desk is the most likely situation. But the Japanese itself does not force that distinction.

This is an important grammar point.

• 並べます = arrange / line up
• 並べておきます = arrange and leave it that way beforehand; arrange in preparation

The pattern ～ておく often means:

1. do something in advance for a later purpose
2. sometimes leave something as it is

In this sentence, the first meaning is the one being used.
So 並べておきます means something like:

• I’ll lay out the materials beforehand
• I arrange the materials in advance

This sounds more natural here than plain 並べます, because the sentence is specifically about doing it before class.

Not exactly.

• 置く = put / place
• 並べる = line up / arrange in an orderly way

So 教材を机の上に置きます would just mean put the materials on the desk.

But 教材を机の上に並べておきます suggests more than just placing them there. It implies that they are laid out neatly, probably in a useful order for class.

It is in the non-past polite form.

Japanese ます forms do not divide things as strictly into present vs. future as English does. Depending on context, 並べておきます could mean:

• I lay them out in advance (habitual/present)
• I will lay them out in advance (future)
• I make a point of laying them out beforehand (general practice)

Because the sentence includes before class, it often feels like either a habitual action or a planned future action.

Yes, to some extent. Japanese word order is more flexible than English because particles show each word’s role.

For example, these are both natural:

• 授業の前に、教材を机の上に並べておきます。
• 授業の前に、机の上に教材を並べておきます。

Both mean basically the same thing.

That said, the original order is very natural:

• time phrase first
• object next
• location before the verb
• verb at the end

The comma helps separate the introductory time phrase from the rest of the sentence:

• 授業の前に、 = Before class,
• 教材を机の上に並べておきます。 = I lay out the materials on the desk in advance.

It makes the sentence easier to read, but in a short sentence like this, punctuation can sometimes vary.