An deiner Stelle würde ich heute früher schlafen gehen, damit du morgen im Kurs wacher bist.

Literally, An deiner Stelle means in your place or in your position.

Why deiner?

• deiner is the dative form of du
• this expression uses an + dative
• so deine Stelle becomes deiner Stelle

This is a very common idiom in German for giving advice:

• An deiner Stelle würde ich ... = If I were you, I would ...

würde ich is a common way to form Konjunktiv II, which is often used for:

• hypotheticals
• polite suggestions
• softer advice

So An deiner Stelle würde ich ... is not a simple statement of fact. It means something like:

• If I were in your situation, I would ...

It sounds less direct and more polite than giving a blunt command.

Yes, absolutely.

Both are correct:

• An deiner Stelle würde ich heute früher schlafen gehen ...
• Ich würde an deiner Stelle heute früher schlafen gehen ...

The difference is mainly emphasis:

• starting with An deiner Stelle emphasizes your situation
• starting with Ich würde emphasizes my advice/opinion

In German main clauses, the finite verb must stay in second position, so both versions work as long as würde remains the second element.

schlafen gehen is a normal German expression meaning to go to sleep or to go to bed to sleep.

Here, würde is the finite verb, so the other verbs stay in the infinitive at the end:

• würde ... schlafen gehen

This is common with würde constructions.

You can think of it like:

• I would go sleep earlier today

In natural English we say go to sleep or go to bed earlier.

früher is the comparative form of früh, so it means earlier.

Here it works as an adverb, modifying the action schlafen gehen:

• früher schlafen gehen = go to sleep earlier

Why no ending? Because adverbs do not take adjective endings in German.

Compare:

• ein früher Termin = an early appointment
• früher schlafen gehen = go to sleep earlier

damit introduces a purpose clause. It means:

• so that
• in order that

So:

• ..., damit du morgen im Kurs wacher bist. means:
• ..., so that you are more awake in class tomorrow.

It shows the goal of the advice.

Because damit is a subordinating conjunction.

In German subordinate clauses, the conjugated verb goes to the end:

• damit du morgen im Kurs wacher bist

That is standard German word order.

Compare:

• main clause: Du bist morgen im Kurs wacher.
• subordinate clause: ..., damit du morgen im Kurs wacher bist.

German very often uses the present tense for future meaning when the time is already clear from a word like morgen.

So:

• morgen ... bist = tomorrow you are / will be

This is completely normal German.

A future form such as sein wirst is possible in some contexts, but here it would sound less natural and less simple.

wacher is the comparative form of wach, so it means:

• more awake
• more alert

German often uses a comparative even when the comparison is only implied.

So here the idea is:

• more awake than you would otherwise be
• more awake than usual

You do not need to add als ... if the comparison is understood from context.

im is a contraction of in dem.

So:

• im Kurs = in dem Kurs

This contraction is extremely common and usually sounds more natural.

Why dem? Because this is a location, not movement:

• being in class = location
• so German uses dative here

If it were movement into something, you might see accusative instead.

Their placement is natural German word order.

In the main clause:

• heute früher schlafen gehen
• heute sets the time
• früher adds earlier

In the subordinate clause:

• morgen im Kurs wacher bist
• morgen gives the time
• im Kurs gives the place

German often puts time expressions fairly early in the clause.

Some variation is possible, but this version sounds very natural.

Yes. That would also be correct:

• Du solltest heute früher schlafen gehen, damit du morgen im Kurs wacher bist.

The difference is tone:

• Du solltest ... = more direct advice
• An deiner Stelle würde ich ... = softer, more tactful, more like If I were you...

So the original sentence sounds a bit gentler and more polite.

They are similar, but not always identical.

• schlafen gehen focuses on going to sleep
• ins Bett gehen focuses on going to bed

In many everyday situations, they mean almost the same thing. But technically:

• someone can ins Bett gehen without sleeping right away
• schlafen gehen more clearly suggests the intention to sleep

In this sentence, either could work depending on the exact nuance.