المحاضر كتب المنهج على السبورة.

A natural Egyptian-style pronunciation would be:

el-moḥāḍer katab el-manhag ʿala s-sabūra

A few useful notes:

• المحاضر → el-moḥāḍer
• كتب → katab
• المنهج → el-manhag
  In Egyptian Arabic, ج is usually pronounced like g in go.
• على → ʿala
• السبورة → es-sabūra
  Here, the l of الـ is not pronounced because س is a sun letter.

It is understandable in Egyptian Arabic, but it sounds a bit formal or school/book-like.

Why?

• المحاضر is a fairly formal word for lecturer
• المنهج is also a formal/academic word, often meaning curriculum or syllabus

In casual Egyptian, people might use different words depending on the situation. For example:

• الدكتور = the professor / lecturer
• المدرس = the teacher
• الدرس = the lesson

So the sentence is fine, but it leans a little toward formal Arabic vocabulary.

Because Arabic can use more than one normal word order.

This sentence uses:

subject + verb + object
المحاضر كتب المنهج

That order is very common in Egyptian Arabic speech.

You could also have a verb-first order in Arabic:

كتب المحاضر المنهج

That is also correct, but it feels more formal or more like written Arabic in many contexts.

So for a learner of Egyptian Arabic, the order in your sentence is very natural.

كتب is the past tense of the verb to write.

Here it means:

he wrote

Why he?

Because the subject المحاضر is:

• singular
• masculine

So كتب matches that subject.

You can think of it like this:

• كتب = he wrote
• كتبت = she wrote / I wrote, depending on context
• كتبوا = they wrote

So in this sentence, كتب agrees with المحاضر.

Because الـ means the.

So:

• المحاضر = the lecturer
• المنهج = the curriculum / the syllabus
• السبورة = the board

Arabic uses definiteness a lot when the thing is already understood from the situation.

Also, Arabic does not have a separate word for a/an.

So:

• محاضر = a lecturer
• المحاضر = the lecturer

In this sentence, the speaker is talking about specific things, so the definite article makes sense.

Because س is a sun letter.

In Arabic, when الـ comes before a sun letter, the l sound disappears in pronunciation and the next consonant is doubled.

So:

• السبورة
• written with ال
• pronounced es-sabūra

But in المحاضر, م is a moon letter, so the l is pronounced:

• المحاضر
• pronounced el-moḥāḍer

This is a very common pronunciation rule, and it is important for sounding natural.

المنهج usually means:

• the curriculum
• the syllabus
• the course material

The best translation depends on context.

For example:

• in a school or university context, the syllabus or the curriculum may fit
• if someone is talking more loosely, it could mean the lesson material

In everyday Egyptian speech, if you mean one specific lesson rather than the whole syllabus, people might more naturally say الدرس.

It literally means:

on the board

Breakdown:

• على = on
• السبورة = the board / the blackboard

So this phrase tells you where the writing happened.

It is a prepositional phrase acting like an adverb of place.

Yes, in natural speech it often gets shortened or flows together with the next word.

Careful pronunciation:

ʿala s-sabūra

Fast natural speech may sound more like:

ʿalas-sabūra

This is normal connected speech. The meaning does not change.

Not for everyday Egyptian Arabic.

In full Standard Arabic, words can have case endings in very careful reading, but in normal Egyptian speech these endings are not pronounced.

So for practical Egyptian Arabic, you can simply learn it as:

el-moḥāḍer katab el-manhag ʿala s-sabūra

That is the useful spoken form.