A mi profesora le llena de orgullo ver nuestro progreso al final del semestre.

Yes — they both refer to the same person, and that is very normal in Spanish.

This is called indirect object doubling. In Spanish, when the indirect object is a person, it is very common to include:

• the indirect object pronoun: le
• and the full phrase: a mi profesora

So:

• A mi profesora = to my teacher
• le = to her

The sentence could be understood literally as:

To my teacher, seeing our progress fills her with pride.

The le is not optional here in natural Spanish. It sounds much more normal with it.

Llenar de means to fill with.

So:

• llenar = to fill
• de orgullo = with pride

Therefore:

• le llena de orgullo = fills her with pride

Structure:

• le = her / to her
• llena = fills
• de orgullo = with pride

This is a very common Spanish pattern:

• Me llena de alegría = It fills me with joy
• Nos llena de esperanza = It fills us with hope

So the sentence is using a very natural emotional expression.

You could say that, but it would express something slightly different.

• Mi profesora está orgullosa = My teacher is proud
• A mi profesora le llena de orgullo ver nuestro progreso = Seeing our progress fills my teacher with pride

The second version is more expressive because it focuses on what causes the feeling. It highlights that seeing our progress is what produces that pride.

So:

• está orgullosa describes a state
• le llena de orgullo describes the emotional effect of something

The subject is the whole infinitive phrase:

ver nuestro progreso al final del semestre

That entire idea acts as the subject of the verb llena.

So the sentence works like this:

• Ver nuestro progreso al final del semestre = the thing that causes the emotion
• le llena de orgullo = fills her with pride

A more literal word order in English would be:

Seeing our progress at the end of the semester fills my teacher with pride.

This is a useful pattern in Spanish: an infinitive can act like a noun or subject.

For example:

• Viajar es divertido = Traveling is fun
• Aprender español lleva tiempo = Learning Spanish takes time

Because Spanish often uses the infinitive to talk about an action in a general way, like seeing in English.

• ver = to see / seeing

Here, ver nuestro progreso means seeing our progress.

Why not viendo?

• viendo means seeing in the sense of while seeing or in the process of seeing
• it does not usually work as the basic subject of the sentence here

Why not que vemos?

• que vemos would mean that we see
• that changes the structure and sounds less natural in this sentence

So ver is the normal choice.

In Spanish, possessive adjectives like mi, tu, su, nuestro usually go before the noun.

So:

• nuestro progreso = our progress

That is the normal order.

El progreso nuestro is possible only in very special, marked, or contrastive contexts, and it would sound unusual here.

So learners should treat nuestro progreso as the standard form.

Al is the contraction of a + el.

So:

• a el final becomes al final

This expression, al final de, means at the end of.

Then:

• del = de + el
• semestre = semester

So:

• al final del semestre = at the end of the semester

These contractions are mandatory in Spanish:

• a + el = al
• de + el = del

Because after llenar de, Spanish often uses the noun without an article when talking about a quality, emotion, or substance in a general sense.

So:

• llenar de orgullo = fill with pride
• llenar de alegría = fill with joy
• llenar de miedo = fill with fear

Using del orgullo would usually sound wrong here.

Spanish often leaves out the article in these kinds of fixed patterns after prepositions.

Yes. That is also correct.

This version puts the subject first:

Ver nuestro progreso al final del semestre llena de orgullo a mi profesora.

That may feel easier to understand at first because it follows a clearer subject-verb-object order.

The original sentence:

A mi profesora le llena de orgullo ver nuestro progreso al final del semestre

puts the person affected first, which is also very natural in Spanish.

So both are correct, but the original is especially natural when the speaker wants to highlight my teacher first.

Both can mean teacher, but they are not always used in exactly the same way.

In Spain:

• profesor / profesora is very common for teachers in general, especially in secondary school or higher education
• maestro / maestra is often more associated with primary school, though usage can vary

So mi profesora is a very normal choice.

Also, profesora is feminine because the teacher is female.

Yes. In this structure, the person who experiences the emotion is treated as an indirect object.

So in:

A mi profesora le llena de orgullo...

the person affected is:

• a mi profesora
• replaced by le

This is similar to other Spanish verbs and expressions where the experiencer is an indirect object:

• Le gusta la música = She likes music
• Le emociona el final = The ending excites her
• Le preocupa el examen = The exam worries her

Spanish often builds emotional expressions this way, even when English would use a normal subject.

Yes, but they are different parts of speech:

• orgullo = pride (noun)
• orgulloso / orgullosa = proud (adjective)

So:

• Le llena de orgullo = It fills her with pride
• Está orgullosa = She is proud

This is a useful distinction to remember because Spanish often switches between a noun-based expression and an adjective-based one more freely than English learners expect.