Chaque fois que la sonnerie retentit, les enfants se remettent en rang.

Chaque fois que means every time that or simply whenever.

It introduces a repeated action:

• Chaque fois que la sonnerie retentit... = Every time the bell rings...

This structure is very common in French:

• Chaque fois qu’il pleut, je prends un parapluie.
• Chaque fois que je le vois, il sourit.

Notice that que becomes qu’ before a vowel sound:

• Chaque fois qu’il arrive...

La sonnerie refers to the ringing sound or bell signal, especially in places like schools, phones, alarms, or doorbells.

So in a school context:

• la sonnerie = the bell / the bell ringing / the school bell signal

By contrast:

• la cloche is the physical bell itself

In many school-related sentences, French naturally uses la sonnerie where English often just says the bell.

Retentit comes from the verb retentir, which means to ring out, to resound, or to sound loudly.

Here:

• la sonnerie retentit = the bell rings / the bell sounds

It is in the present tense, third person singular:

• je retentis is not normally used much in everyday speech for this meaning
• il/elle retentit

This verb is a bit more formal or literary than very basic verbs like sonner, but it is still perfectly understandable.

Yes, grammatically it is possible, because sonner means to ring.

But la sonnerie sonne sounds repetitive, since sonnerie already refers to a ringing signal. French usually prefers something more natural, such as:

• Chaque fois que la sonnerie retentit
• Chaque fois que la cloche sonne

So:

• la cloche sonne = very natural
• la sonnerie retentit = natural
• la sonnerie sonne = possible, but less elegant

Here, se remettre means to put themselves back into a certain position or state.

So:

• les enfants se remettent en rang = the children line up again / get back into line

The reflexive pronoun se shows that the subject is acting on itself:

• remettre = to put back
• se remettre = to put oneself back / get back

In this sentence, the idea is that the children had already been in line before, or are returning to that arrangement after a break.

Because this sentence describes a habitual action in the present, not a completed passive result.

• se remettent = they get back into line
• sont remis would suggest are put back, which changes the meaning and structure

Here we need an active reflexive verb:

• les enfants se remettent en rang

That means the children themselves are returning to line formation.

Also, remettent is the present tense of remettre with ils/elles:

• je remets
• tu remets
• il remet
• nous remettons
• vous remettez
• ils remettent

En rang is a fixed expression meaning in line, in rows, or lined up properly, especially in schools or military-style organization.

So:

• se mettre en rang = to line up
• se remettre en rang = to line up again / get back in line

Dans une rangée means in a row, but it is less natural here. It describes position more literally, while en rang is the standard idiom for people forming a line or orderly rows.

For schoolchildren, en rang is exactly the expression you would expect.

Because en rang is an idiomatic expression. French often uses a singular noun in fixed phrases where English may think more in terms of a group.

It does not mean there is only one child or necessarily only one physical row. It means the children are arranged in line or in proper order.

You should learn en rang as a set phrase.

Because les enfants is a plural subject, so the verb must agree with it.

• l’enfant se remet en rang = the child gets back in line
• les enfants se remettent en rang = the children get back in line

The ending -ent marks the third person plural in writing, even though in pronunciation it is usually silent.

The comma separates the introductory time clause from the main clause.

Structure:

• Chaque fois que la sonnerie retentit = subordinate clause
• les enfants se remettent en rang = main clause

This is similar to English:

• Every time the bell rings, the children line up again.

The comma helps readability. In French, it is common when the subordinate clause comes first.

Yes. Here the present tense is exactly right because the sentence describes something habitual or general.

• Chaque fois que la sonnerie retentit, les enfants se remettent en rang.

This means:

• whenever the bell rings, this is what happens

French often uses the present tense for repeated actions and general truths, just like English can:

• When it rains, the streets get wet.
• Quand il pleut, les rues deviennent mouillées.

Other tenses are possible in different contexts, but for a routine or repeated event, the present is very natural here.

Yes, slightly.

• se mettre en rang = to line up
• se remettre en rang = to line up again / get back into line

The prefix re- in remettre adds the idea of again or back.

So this sentence suggests that the children return to line formation, probably after recess, a class change, or some other interruption.

This sentence is already correct and natural, but a slightly more everyday version could be:

• Chaque fois que la cloche sonne, les enfants se remettent en rang.

That version uses:

• la cloche instead of la sonnerie
• sonne instead of retentit

It sounds a bit simpler and more conversational. The original sentence is still perfectly good French.