Tebeşir tozu yüzünden tahta silinince bile sınıf biraz beyaz kaldı.

Yüzünden means because of, due to, or as a result of.

So:

• Tebeşir tozu yüzünden = because of the chalk dust

A useful nuance: yüzünden is often used when the cause is undesirable, annoying, or has a negative result.

Examples:

• Yağmur yüzünden gelemedim. = I couldn’t come because of the rain.
• Trafik yüzünden geç kaldık. = We were late because of traffic.

So in this sentence, it suggests the chalk dust caused an unwanted result.

Tebeşir tozu is a standard Turkish noun compound meaning chalk dust.

Structure:

• tebeşir = chalk
• toz = dust
• tozu = its dust / dust of

In Turkish, many noun compounds are formed like this:

• kahve fincanı = coffee cup
• okul kapısı = school door
• tebeşir tozu = chalk dust

You can sometimes see a fuller possessive structure like tebeşirin tozu, but that usually sounds more specific or literal: the dust of the chalk. Here, the regular compound tebeşir tozu is the natural choice.

Here tahta means board, specifically a classroom board/blackboard/whiteboard.

Although tahta can also mean wood in other contexts, in a classroom sentence like this, tahta silinince clearly means when the board was wiped/erased.

So:

• tahta = the board
• not wood in this sentence

Because silinince comes from silinmek, not directly from silmek.

• silmek = to wipe / erase (transitive)
• silinmek = to be wiped / to get erased (passive/intransitive)

Then:

• silinince = when it is/was wiped, once it was wiped

So:

• tahta silinince = when the board was wiped
• not when someone wiped the board in an explicitly active way

If you used silince, it would more naturally mean when (someone) wipes/wiped or when I wipe/wiped, depending on context. Here the passive form fits the meaning better because the focus is on the board, not on who wiped it.

The ending -ince / -ınca / -unca / -ünce often means:

• when
• once
• after

depending on context.

So:

• silinince = when it was wiped
• tahta silinince = when the board was wiped
• in natural English here: even after the board was wiped

Other examples:

• Eve gelince ararım. = I’ll call when I get home.
• Onu görünce şaşırdım. = I was surprised when I saw him/her.
• Yemek bitince çıkalım. = Let’s leave once the meal is finished.

So -ince links one event to another in time.

Because bile means even, and here it applies to the whole clause tahta silinince.

So:

• tahta silinince bile = even when/after the board was wiped

Placing bile after that clause shows that the surprising thing is this whole idea: despite the board being wiped, the classroom still remained a bit white.

Compare:

• Ben bile anladım. = Even I understood.
• Yağmurda bile geldiler. = They came even in the rain.
• Silinince bile = even after it was wiped

So its position tells you what even is emphasizing.

Because in tahta silinince, tahta is functioning as the subject of the passive verb silinince.

Compare the active version:

• Birisi tahtayı sildi. = Someone wiped the board.
  • tahtayı is the direct object, so it takes accusative -yı

Passive version:

• Tahta silindi. = The board was wiped.
  • tahta becomes the grammatical subject, so it has no accusative ending

That is exactly what is happening inside:

• tahta silinince = when the board was wiped

So the lack of accusative is because the clause is passive.

Here it means classroom.

Sınıf can mean:

• class = a group of students
• classroom = the room itself

In this sentence, biraz beyaz kaldı fits the meaning the classroom remained a little white, not the class of students remained white. So context tells you it must be classroom.

It means remained a little white or stayed somewhat white.

Breakdown:

• biraz = a little / somewhat
• beyaz = white
• kaldı = remained / stayed

So:

• sınıf biraz beyaz kaldı = the classroom stayed a bit white

This sounds natural in Turkish even though English might prefer something like:

• the classroom still looked a bit white
• the room still had a whitish look
• the classroom remained slightly white from the chalk dust

Turkish often uses X kaldı to mean stayed/remained X.

Examples:

• Kapı açık kaldı. = The door stayed open.
• Oda soğuk kaldı. = The room remained cold.
• Duvar kirli kaldı. = The wall stayed dirty.

Because kaldı means stayed/remained, while oldu means became/turned.

This sentence is about a continuing result:

• the room was still white-ish afterward

So:

• beyaz kaldı = remained white
• beyaz oldu = became white

That difference matters a lot.

Compare:

• Oda sessiz oldu. = The room became quiet.
• Oda sessiz kaldı. = The room stayed quiet.

In your sentence, the whiteness does not newly begin at that moment; it continues despite wiping the board. So kaldı is the right choice.

The word order is normal and natural for Turkish.

Turkish often places background information first and the main result later:

• Tebeşir tozu yüzünden = because of the chalk dust
• tahta silinince bile = even after the board was wiped
• sınıf biraz beyaz kaldı = the classroom remained a little white

This creates a very natural flow:

1. cause
2. surprising condition
3. main result

You could rearrange parts in Turkish, but the original order is smooth and emphasizes the final result.

A very natural translation would be:

• Even after the board was wiped, the classroom remained a little white because of the chalk dust.

Other possible translations:

• Because of the chalk dust, the classroom still looked a bit white even after the board was erased.
• Even when the board had been wiped, the classroom stayed a little white from the chalk dust.

The exact English wording can vary, but the Turkish structure is expressing:

• cause: chalk dust
• contrast/surprise: even after wiping the board
• result: the classroom still looked a bit white

It is somewhat literal, but in context it can easily imply looked white or had a white appearance.

Turkish often uses color adjectives more directly than English:

• yer sarı kaldı = the floor stayed yellow
• duvar gri kaldı = the wall remained gray
• oda beyaz kaldı = the room stayed white / looked white

In this sentence, the idea is probably not that the entire classroom turned pure white, but that there was still a noticeable whitish coating or appearance because of chalk dust.

So the meaning is closer to:

• the classroom still looked a bit white than a very strict literal image of solid white paint.

Yes, structurally it can sometimes feel close to even when/if wiped, because -ince can be flexible in context. But in this sentence, the most natural interpretation is:

• even after the board was wiped or
• even when the board was wiped

Why? Because the whole sentence describes an actual result:

• chalk dust caused the classroom to remain somewhat white

So it reads as a real situation, not a hypothetical one.

If Turkish wanted a more clearly hypothetical sense, other structures might be used. Here silinince bile is best understood as a real, completed event within the narrative.

A simple breakdown is:

• Tebeşir tozu yüzünden
  = prepositional/postpositional phrase of cause
  = because of the chalk dust

• tahta silinince bile
  = subordinate time/concession clause
  = even after the board was wiped

• sınıf biraz beyaz kaldı
  = main clause
  = the classroom remained a little white

So the whole sentence is basically:

Because of X, even after Y happened, Z remained in that state.

That pattern is very common in Turkish.