En nia klaso ĉiu nova temo estas klarigita per simplaj vortoj, por ke ĉiu studento estu preta respondi.

En nia klaso means in our class.

• en = in
• nia = our
• klaso = class

So this phrase sets the context: what happens is happening in our class.

Depending on context, klaso can mean:

• the group of students
• the class session
• the classroom situation in general

So En nia klaso is a natural way to say In our class.

Ĉiu means each or every, and it is followed by a singular noun.

So:

• ĉiu temo = each topic / every topic
• ĉiuj temoj = all topics

In this sentence, the meaning is that every individual new topic gets explained, so Esperanto uses the singular:

• ĉiu nova temo = each new topic

The adjectives also stay singular to match:

• nova matches singular temo

This is normal in Esperanto.

When English says every student, it also uses a singular noun. Esperanto works the same way:

• ĉiu studento = every student
• ĉiu temo = every topic

Even though the idea includes many students or many topics, Esperanto treats each one individually, so the noun remains singular.

Estas klarigita is a passive construction.

Breakdown:

• estas = is
• klarigita = explained / having been explained

Together:

• estas klarigita = is explained

So:

• ĉiu nova temo estas klarigita = each new topic is explained

This focuses on the topic receiving the action, not on who is doing the explaining.

Compare:

• La instruisto klarigas la temon. = The teacher explains the topic.
  (active)
• La temo estas klarigita. = The topic is explained.
  (passive)

Klarigita comes from the verb klarigi, meaning to explain.

It is built like this:

• klar- = clear
• -ig- = make, cause
  So klarigi literally means to make clear
• -ita = past passive participle

So klarigita means explained or more literally made clear.

In the full phrase:

• estas klarigita = is explained

Per simplaj vortoj means with simple words or using simple words.

• per often means by means of, with, or using
• simplaj = simple (plural)
• vortoj = words

So this phrase explains the method:

• the topic is explained by means of simple words

This is different from kun, which usually means with in the sense of accompaniment:

• kun amiko = with a friend
• per simplaj vortoj = using simple words

Because both words are plural.

• vortoj = words
• the adjective must agree with the noun
• so simpla becomes simplaj

This is basic Esperanto adjective agreement:

• singular: simpla vorto = simple word
• plural: simplaj vortoj = simple words

Adjectives in Esperanto match the noun in number, and also in accusative if there is one.

Because none of those words is a direct object here.

• ĉiu nova temo is the subject of the passive verb estas klarigita
• ĉiu studento is the subject of estu preta
• simplaj vortoj follows the preposition per, and prepositions normally do not take -n

The accusative -n is mainly used for:

1. direct objects
2. motion toward something in some cases

Since none of those functions applies here, there is no -n.

Por ke means so that or in order that.

It introduces a clause of purpose.

So:

• por ke ĉiu studento estu preta respondi
  = so that every student may be ready to answer = in order that every student is ready to answer

This shows the reason or goal for explaining the topic in simple words.

After por ke, Esperanto normally uses the volitive verb form, which often looks a bit like a subjunctive in English explanations.

So:

• estu comes from esti = to be
• estu expresses intention, desired result, or purpose

That is why Esperanto says:

• por ke ĉiu studento estu preta
  = so that every student may be ready

Using estas there would not be the normal form for a purpose clause.

This is a very common pattern:

• Mi klarigas ĝin, por ke vi komprenu. = I explain it so that you understand / may understand.
• Ni parolas malrapide, por ke ĉiuj aŭdu. = We speak slowly so that everyone hears / can hear.

Not exactly. It is the same verb form used for commands and wishes, but here it expresses purpose, not a direct order.

So in this sentence, estu does not mean someone is being told Be ready!
Instead, it means something like:

• so that every student may be ready
• in order for every student to be ready

So the form is the same, but the function depends on context.

Preta respondi means ready to answer.

• preta = ready
• respondi = to answer

In Esperanto, an adjective can be followed by an infinitive very naturally:

• preta labori = ready to work
• preta helpi = ready to help
• preta respondi = ready to answer

So ĉiu studento estu preta respondi means:

• every student may be ready to answer

No. Respondi can be used without stating exactly what is being answered.

So preta respondi can simply mean:

• ready to answer
• ready to respond

If you wanted to say what is being answered, you could add it:

• preta respondi demandon = ready to answer a question
• preta respondi al la instruisto = ready to answer the teacher / reply to the teacher

In the given sentence, the object is left unstated because the general idea is enough.

The sentence has two main parts:

1. En nia klaso ĉiu nova temo estas klarigita per simplaj vortoj

   • In our class each new topic is explained with simple words

2. por ke ĉiu studento estu preta respondi

   • so that every student may be ready to answer

So the full structure is:

• setting: En nia klaso
• main statement: ĉiu nova temo estas klarigita per simplaj vortoj
• purpose: por ke ĉiu studento estu preta respondi

This is a very standard and natural Esperanto sentence structure.

Yes, Esperanto word order is fairly flexible, though some orders sound more natural than others.

For example, these are possible:

• En nia klaso ĉiu nova temo estas klarigita per simplaj vortoj...
• Ĉiu nova temo estas klarigita en nia klaso per simplaj vortoj...

But the original order is smooth and clear because it starts with the setting En nia klaso.

Even though Esperanto allows flexibility, learners should usually prefer the most straightforward order unless there is a reason to emphasize something.

Yes, it is very natural.

It uses several common Esperanto patterns:

• en
  • place/context
• ĉiu
  • singular noun
• passive with estas
  • participle
• per for means or method
• por ke
  • volitive form
• adjective + infinitive, as in preta respondi

So this is a good model sentence for intermediate grammar.