Laten we er vooral op letten dat iedereen kan volgen, en laten we daarna gewoon verdergaan met de oefening.

Laten we is the standard Dutch way to say let’s.

• Laten = let
• we = we

So Laten we opletten means Let’s pay attention or Let’s make sure.

It is a very common way to make a suggestion that includes the speaker.

The speaker is making two linked suggestions:

1. Laten we er vooral op letten ...
2. en laten we daarna gewoon verdergaan ...

Repeating laten we makes both actions sound clear and deliberate:

• first, let’s make sure everyone can keep up
• then, let’s continue with the exercise

In natural speech, Dutch sometimes repeats this structure just like English might repeat let’s:

• Let’s do this, and let’s do that afterwards.

This is one of the most important things to notice in the sentence.

The verb is letten op, which means to pay attention to.

In this sentence it appears as:

• er ... op letten

That happens because Dutch often uses a pronominal adverb like erop when referring forward to a clause.

So:

• ergens op letten = to pay attention to something
• erop letten dat ... = to make sure / to pay attention that ...

In other words, er and op belong together:

• erop letten

But in the sentence they are split:

• Laten we er vooral op letten dat ...

This splitting is very normal in Dutch.

Because Dutch often uses erop letten dat ... as a fixed pattern.

Even though the real content comes after it in the dat-clause, Dutch still keeps erop:

• Ik let erop dat iedereen op tijd is.
• We moeten erop letten dat niemand achterblijft.

This is very idiomatic. English usually does not need a direct equivalent of er here.

So you should think of erop letten dat ... as a chunk meaning something like:

• to make sure that ...
• to pay attention to the fact that ...

Vooral means especially, above all, or particularly.

In this sentence:

• Laten we er vooral op letten ...

it gives extra emphasis to that first action:

• Let’s especially make sure ...
• Above all, let’s pay attention to ...

Its position before op letten is natural because it modifies the whole idea of paying attention.

Iedereen means everyone, but grammatically it is singular in Dutch.

So you say:

• iedereen kan = everyone can

not:

• iedereen kunnen

This is similar to English, where we also say:

• everyone can not
• everyone cans / everyone are able to

Here volgen does not literally mean just to follow in a physical sense.

In this context, iedereen kan volgen means:

• everyone can keep up
• everyone can follow what is happening
• everyone can understand the explanation/process

This is a very common use of volgen in Dutch, especially in classrooms, meetings, or explanations.

For example:

• Kun je me nog volgen? = Can you still follow me?
• Ik kan het niet meer volgen. = I can’t keep up anymore.

Because after dat, Dutch uses a subordinate clause.

Basic pattern:

• dat + subject + ... + verbs

So:

• dat iedereen kan volgen

Here:

• iedereen = subject
• kan volgen = verb cluster

With a modal verb like kunnen, Dutch typically keeps the verbs together at the end of the subordinate clause:

• dat iedereen kan volgen

This is the standard order learners should use.

In some kinds of Dutch, especially in certain regional or stylistic patterns, verb order variation can happen in subordinate clauses. But for learners, the safest and most standard form here is:

• dat iedereen kan volgen

So in practice, treat this as the normal order you should produce.

Both spellings exist, but they do not always mean the same thing.

Here verdergaan is the verb meaning:

• to continue
• to go on

So:

• verdergaan met de oefening = continue with the exercise

As a single verb, verdergaan is the best choice here.

You will also see it split in certain sentence patterns because Dutch has separable verbs:

• We gaan verder met de oefening.
• Laten we verdergaan met de oefening.

So:

• infinitive: verdergaan
• finite main-clause form: gaan ... verder

That is normal Dutch separable-verb behavior.

Gewoon is a very common Dutch word with several shades of meaning. Here it adds a tone like:

• just
• simply
• then just continue
• just carry on

It makes the instruction sound natural and practical, as if the speaker is saying:

• first check that everyone is still with us, then just continue

It often softens or normalizes an action.

Daarna means after that or afterwards.

It links the second action to the first one:

1. make sure everyone can follow
2. after that, continue with the exercise

Its placement before gewoon verdergaan is very natural. Dutch often puts time words like this early in the clause.

The verb verdergaan often combines with met when introducing the thing that is being continued.

So:

• verdergaan met iets = to continue with something

Examples:

• We gaan verder met hoofdstuk 3.
• Laten we verdergaan met de les.
• Laten we verdergaan met de oefening.

This is the normal preposition to use here.

It is neutral and natural. It would fit well in:

• a classroom
• a workshop
• a meeting
• a group activity

It is not extremely formal, but it is polite and cooperative. The repeated laten we makes it sound inclusive rather than bossy.

Because laten is followed directly by an infinitive.

So you say:

• Laten we letten
• Laat hem gaan
• Ik laat haar spreken

not:

• Laten we te letten

This is similar to English let:

• Let’s go not
• Let’s to go

So after laten, the next verb stays as a plain infinitive.

Yes. Erop is the combined form of er + op.

You can think of these as the same underlying combination:

• erop letten
• er ... op letten

When other words come in between, Dutch often splits them:

• We moeten erop letten dat ...
• We moeten er goed op letten dat ...
• Laten we er vooral op letten dat ...

So in your sentence, the split form is perfectly normal because vooral comes in between.