Uczymy się poprzez ćwiczenia.

Because uczyć się is the Polish verb meaning to learn.

Without się, uczyć usually means to teach.

• Uczymy się polskiego = We are learning Polish
• Uczymy dzieci polskiego = We teach children Polish

So in your sentence, uczymy się means we learn.

Się is a very common Polish word used with many verbs. In this case, it is part of the verb uczyć się.

It does not translate neatly as a separate English word here. You should learn uczyć się as one whole unit meaning to learn.

Although się originally has a reflexive function in many contexts, in this sentence the most useful thing for a learner is simply:

• uczyć się = to learn
• uczyć = to teach

It can mean both, depending on context.

Polish present tense often covers both:

• we learn
• we are learning

So Uczymy się poprzez ćwiczenia could mean:

• We learn through exercises
• We are learning through exercises

English forces you to choose more often than Polish does.

Uczymy is the 1st person plural present tense form of uczyć się.

That means it corresponds to we learn.

Very roughly:

• uczę się = I learn
• uczysz się = you learn
• uczy się = he/she/it learns
• uczymy się = we learn
• uczycie się = you all learn
• uczą się = they learn

So the ending -my is a common signal for we in Polish verbs.

Here poprzez means through, by means of, or by way of.

So:

• poprzez ćwiczenia = through exercises
• by means of exercises

It shows the method or means by which learning happens.

Sometimes learners wonder this because both can relate to through.

In this sentence, poprzez works well because it clearly means by means of or through the use of exercises.

Przez is also a very common word, but it has a broader range of meanings, such as:

• through
• across
• for a period of time
• because of

So poprzez is a good choice when you want to emphasize the method.

That said, in natural Polish, people might also say things like:

• Uczymy się dzięki ćwiczeniom = We learn thanks to exercises / through exercises
• Uczymy się, wykonując ćwiczenia = We learn by doing exercises

Because poprzez is followed by the accusative case, and ćwiczenia is the accusative plural form of ćwiczenie.

The singular noun is:

• ćwiczenie = exercise

Plural:

• ćwiczenia = exercises

For this neuter noun, the nominative plural and accusative plural look the same, so you see ćwiczenia in both roles.

The dictionary form is ćwiczenie.

That means:

• ćwiczenie = exercise or practice activity
• ćwiczenia = exercises

In learning contexts, ćwiczenia often refers to drills, practice tasks, workbook activities, or training exercises.

Yes, it is understandable and natural.

It sounds slightly formal or instructional because of poprzez. Depending on context, a Polish speaker might also say:

• Uczymy się przez ćwiczenia
• Uczymy się dzięki ćwiczeniom
• Uczymy się, robiąc ćwiczenia

These are slightly different in tone, but your sentence is perfectly fine.

Yes. Polish word order is more flexible than English word order.

For example, these are possible:

• Uczymy się poprzez ćwiczenia.
• Poprzez ćwiczenia uczymy się.

The first one is the most neutral. Moving poprzez ćwiczenia to the front gives it more emphasis, something like Through exercises, we learn.

So the original order is the most straightforward and natural in most cases.

This word can be tricky for English speakers.

A rough guide is:

• ćwi- sounds somewhat like chvee, but with a softer initial sound than English ch
• -cze- sounds like che
• -nia sounds like nya

Very roughly: CHVEE-chen-ya, though that is only an approximation.

A few helpful points:

• ć is a soft consonant, somewhat like a very soft ch
• w in Polish sounds like English v
• cz sounds like English ch
• ni before a vowel often sounds like ny

So ćwiczenia is one of those words best learned by hearing it several times.

Polish uczymy simply means we learn. By itself, it does not tell you whether the listener is included or excluded.

Usually, context tells you:

• a teacher speaking to students might mean we = teacher + students
• a narrator might mean we = a general group of people
• a group member might mean we = my group

So just like English we, it depends on who is speaking.

Yes — probably these three items:

• uczyć się = to learn
• poprzez = through / by means of
• ćwiczenie / ćwiczenia = exercise / exercises

Also remember the key contrast:

• uczyć = to teach
• uczyć się = to learn

That distinction is one of the most useful things in this sentence.