Magistra tabulam Italiae discipulis ostendit.

Because magistra is in the nominative singular, which is the case normally used for the subject of a sentence.

Here, magistra means teacher and has the form you would expect for a first-declension nominative singular noun. So magistra is the teacher as the person doing the action.

Also, the verb ostendit is third person singular, so it matches a singular subject like magistra.

Because tabulam is the accusative singular form, and the accusative is usually used for the direct object.

The direct object is the thing being shown. In this sentence, the teacher is showing the map, so tabulam is in the accusative.

• tabula = nominative singular, map/tablet/board as a subject
• tabulam = accusative singular, map as a direct object

So the sentence is structured like this:

• magistra = subject
• tabulam = direct object
• discipulis = indirect object
• ostendit = verb

Italiae is genitive singular, meaning of Italy.

So tabulam Italiae means a map of Italy or the map of Italy.

This is a very common Latin pattern:

• tabula Italiae = map of Italy
• puella Romae can mean the girl of Rome in a different context, using the same genitive idea

So Italiae is not acting as the subject or object. It is modifying tabulam and telling you what kind of map it is.

Discipulis is dative plural, meaning to the students or for the students.

The verb ostendere often takes:

• a direct object = the thing shown
• an indirect object in the dative = the person something is shown to

So:

• tabulam = the map
• discipulis = to the students

That is why discipulis is not accusative. The students are not the thing being shown; they are the people receiving the showing.

It can mean either one, depending on context.

This is a very important point. Ostendit can be:

• present tense: he/she shows
• perfect tense: he/she showed or has shown

Latin has some verb forms that look identical in these two tenses. So by itself, ostendit is ambiguous.

In this sentence, the meaning would usually be decided by context. If this is an isolated beginner sentence, it is often intended as shows, but grammatically showed is also possible.

Classical Latin does not have definite and indefinite articles like English the and a/an.

So magistra can mean:

• the teacher
• a teacher

And tabulam can mean:

• the map
• a map

English has to choose one when translating, but Latin usually leaves that to context.

Yes. Latin word order is much freer than English word order because the endings show the grammatical function of each word.

So all of these could mean essentially the same thing:

• Magistra tabulam Italiae discipulis ostendit.
• Discipulis magistra tabulam Italiae ostendit.
• Tabulam Italiae magistra discipulis ostendit.

The endings still tell you:

• magistra = subject
• tabulam = direct object
• Italiae = genitive
• discipulis = indirect object

That said, word order is not random. Latin authors often move words for emphasis, style, or focus.

Here are the usual dictionary forms:

• magistra — magistra, magistrae: female teacher
• tabulam — from tabula, tabulae: map, tablet, board
• Italiae — from Italia, Italiae: Italy
• discipulis — from discipulus, discipuli: student, pupil
• ostendit — from ostendo, ostendere, ostendi, ostentum: show

Learners often need to get used to the fact that the word appearing in the sentence is not always the dictionary form.

Yes. Magistra is grammatically feminine and usually refers to a female teacher.

The masculine form would be magister.

So if the sentence had a male teacher, you would expect:

• Magister tabulam Italiae discipulis ostendit.

A good quick breakdown is:

• magistra = nominative singular
• tabulam = accusative singular
• Italiae = genitive singular
• discipulis = dative plural
• ostendit = 3rd person singular verb

A useful method is to ask these questions:

1. Who is doing the action? → magistra
2. What is being shown? → tabulam
3. Map of what? → Italiae
4. Shown to whom? → discipulis

That kind of step-by-step parsing is one of the most helpful habits for reading Latin.

Because it naturally stays close to the noun it modifies.

Tabulam Italiae is a noun phrase meaning the map of Italy. Keeping Italiae next to tabulam makes that connection easy to see.

Latin does separate related words more freely than English sometimes, but when words stay together like this, it often helps clarity. So a learner can spot tabulam Italiae as one unit.

Formally, discipulis could be either dative plural or ablative plural, because those two cases often have the same ending in the second declension.

But in this sentence, dative is the correct interpretation because of the meaning of ostendit:

• the teacher shows something
• to the students

That is a classic direct-object + indirect-object pattern, so discipulis is understood as dative here.