Mama sada čeka u zbornici, jer razrednica još razgovara s drugim roditeljima.

Both mean mother, but they differ in tone.

• mama = mom / mum, more everyday and natural in casual speech
• majka = mother, more formal or neutral, and sometimes more emotionally distant depending on context

In this sentence, Mama sounds very natural.

Sada means now.

In everyday Croatian, sad is also very common and means the same thing. The difference is mostly stylistic:

• sada = a bit fuller, sometimes slightly more careful or standard
• sad = very common in speech

So:

• Mama sada čeka...
• Mama sad čeka...

Both are correct.

They are both 3rd person singular present tense, because the subjects are singular:

• Mama čeka = Mom is waiting
• razrednica razgovara = the homeroom teacher is talking

Croatian present tense often covers both English simple present and present continuous:

• čeka = waits / is waiting
• razgovara = talks / is talking

Here, the natural English translation is is waiting and is talking.

Croatian does not have a separate grammatical continuous tense like English does.

Instead, the simple present is used for both:

• general present actions
• actions happening right now

So čeka can mean either:

• waits
• is waiting

The context tells you which meaning is intended. In this sentence, sada and još make it clear that the action is happening right now.

u zbornici means in the staff room / in the teachers’ room.

The noun is:

• zbornica = staff room, faculty room, teachers’ lounge

After u, when it means in a place (location, not movement), Croatian usually uses the locative case.

So:

• nominative: zbornica
• locative: u zbornici

That is why the ending changes from -a to -i.

In Croatian, u can mean either:

• in / inside a place → usually with locative
• into a place → usually with accusative

Compare:

• Mama je u zbornici. = Mom is in the staff room.
• Mama ide u zbornicu. = Mom is going into the staff room.

In your sentence, čeka describes being in a place, not moving into it, so u zbornici is locative.

Jer means because.

It introduces the reason:

• Mama sada čeka u zbornici
• jer razrednica još razgovara s drugim roditeljima

So the second clause explains why Mom is waiting.

The comma before jer is standard in Croatian when it introduces this kind of subordinate clause.

Razrednica is a school term. It usually means a female homeroom teacher or class teacher.

It comes from razred = class / grade group.

There is also a masculine form:

• razrednik = male homeroom teacher
• razrednica = female homeroom teacher

Since Croatian marks gender in many nouns referring to people, this word tells you the teacher is female.

Here, još means still.

So:

• razrednica još razgovara = the homeroom teacher is still talking

It shows that the action has not finished yet.

Depending on context, još can also mean things like more, another, or yet, but in this sentence still is the natural meaning.

After the preposition s meaning with, Croatian uses the instrumental case.

So:

• drugi roditelji = other parents (nominative)
• s drugim roditeljima = with other parents (instrumental plural)

Both words change because they are part of the same noun phrase:

• drugi → drugim
• roditelji → roditeljima

Because drugim is an adjective agreeing with the noun roditeljima.

Croatian adjectives must match the noun in:

• gender
• number
• case

Here, roditeljima is:

• masculine animate
• plural
• instrumental

So the adjective must also be instrumental plural:

• drugi roditelji = other parents
• s drugim roditeljima = with other parents

Drugima can exist, but it usually functions more like to others / with others without a following noun, depending on the case and context. Here you need the adjective form that directly modifies roditeljima.

Both s and sa can mean with.

Usually, s is the basic form.
Sa is often used for easier pronunciation, especially before certain consonant clusters or words where s alone would sound awkward.

For example:

• s drugim roditeljima = completely normal
• sa školom = often preferred over s školom by many speakers, because it is easier to pronounce

So in your sentence, s drugim roditeljima is the natural form.

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

The sentence:

• Mama sada čeka u zbornici, jer razrednica još razgovara s drugim roditeljima.

could be rearranged in some ways, for example:

• Sada mama čeka u zbornici...
• Mama u zbornici sada čeka...

But the original version sounds natural and neutral.

Word order in Croatian often changes for:

• emphasis
• rhythm
• style
• topic/focus of the sentence

English is usually much more fixed.

Here it is capitalized simply because it is the first word of the sentence.

In Croatian, common nouns like mama are not normally capitalized in the middle of a sentence unless there is some special stylistic reason.

So:

• Mama sada čeka... = capitalized because it starts the sentence
• Vidim mamu. = lowercase in the middle of a sentence

A more formal version might use slightly more formal vocabulary, for example:

• Majka sada čeka u zbornici, jer razrednica još razgovara s drugim roditeljima.

The main change is:

• mama → majka

But in ordinary everyday speech, especially in a family or school context, mama sounds more natural.