Polaznik će savladati praktično gradivo.

Će marks the future tense. In this sentence, polaznik će savladati means the participant/attendee will master.

Serbian commonly forms the future like this:

• ću/ćeš/će/mo/ćete/će + infinitive

So here:

• polaznik = the participant
• će = will
• savladati = to master / overcome / learn successfully

Together: will master.

Because after the future-tense clitic će, Serbian normally uses the infinitive:

• će savladati
• će učiti
• će završiti

So savladati is not a present-tense form here. It is the dictionary form, used after će to build the future.

Savladati usually means to master, to overcome, or to get through successfully, depending on context.

In an educational sentence like this, it most naturally means:

• to master the material
• to learn it successfully
• to become proficient in it

It is a very common verb for completing or mastering something such as:

• savladati gradivo = master the material
• savladati prepreku = overcome an obstacle
• savladati jezik = master a language

Because savladati is perfective, while savladavati is imperfective.

• savladati = to master something successfully, with focus on completion
• savladavati = to be mastering, to work through, to manage repeatedly or over time

In this sentence, the idea is that the learner will successfully complete/master the material, so the perfective verb savladati fits better.

This is very common in Serbian future sentences when the result matters.

Yes, polaznik is a masculine noun.

It usually means:

• participant
• attendee
• course participant
• sometimes student/trainee, depending on context

It comes from educational or training contexts. A female participant would often be:

• polaznica

So this sentence is grammatically masculine singular.

It is in the accusative singular, because it is the direct object of savladati.

The verb savladati takes an object: you master something. Here that something is praktično gradivo.

Now, gradivo is a neuter singular noun, and for many neuter nouns the nominative and accusative look the same. So:

• nominative: praktično gradivo
• accusative: praktično gradivo

That is why nothing visibly changes here.

Because it agrees with gradivo, which is:

• neuter
• singular

Adjectives in Serbian must agree with the noun in gender, number, and case.

So:

• masculine singular: praktičan
• feminine singular: praktična
• neuter singular: praktično

Since gradivo is neuter singular, the correct form is praktično gradivo.

It is an adjective here.

It describes the noun gradivo:

• praktično gradivo = practical material

If it were an adverb, it would describe a verb, something like:

• praktično primeniti = to apply practically / in a practical way

So in this sentence, praktično is not saying master practically. It is saying the material itself is practical.

Gradivo is a very common educational word meaning:

• material
• subject matter
• course material
• content that is studied

It often refers to what students are expected to learn in a class, course, or unit.

It is a bit more specific to learning contexts than a general word like materijal.

For example:

• učiti gradivo = study the material
• preći gradivo = cover the material
• savladati gradivo = master the material

Because Serbian has no articles like English a/an/the.

So Serbian simply says:

• Polaznik će savladati praktično gradivo.

Depending on context, English might translate this as:

• The participant will master the practical material.
• A participant will master practical material.
• The learner will master the practical course content.

English must choose an article, but Serbian does not.

Yes, Serbian word order is relatively flexible, although not completely free.

The neutral order here is:

• Polaznik će savladati praktično gradivo.

You may also see variations for emphasis, such as:

• Praktično gradivo će polaznik savladati.
• Polaznik će praktično gradivo savladati.

These are possible, but they sound more marked or emphatic. For a learner, the original sentence is the most natural basic order.

One important point: će is a clitic, so it normally appears in the second position of the clause.

Yes, it could, if the subject is understood from context.

For example:

• Savladaće praktično gradivo. = He/she will master the practical material.

Serbian often drops subjects when they are clear. But in your sentence, polaznik is included because the speaker wants to name the subject explicitly.

Because će is a clitic, and clitics usually go in the second position of the sentence or clause.

So the normal pattern is:

• Polaznik će savladati...

The attached future form, like savladaće, is most natural when the verb comes first:

• Savladaće praktično gradivo.

But after an explicit subject like polaznik, standard Serbian strongly prefers:

• Polaznik će savladati praktično gradivo.

That is why the version in your sentence is the expected one.