הוא מרגיש טוב יותר כשהמורה מסבירה לאט.

Because המורה here is understood as female.

The noun מורה can mean teacher for either a man or a woman, so the verb form tells you the gender in this sentence:

• מסביר = explaining, masculine
• מסבירה = explaining, feminine

So:

• כשהמורה מסבירה = when the teacher explains, referring to a female teacher

If the teacher were male, it would be:

• כשהמורה מסביר לאט

כש means when.

It is attached directly to the next word here:

• כש + המורה = כשהמורה
• literally: when the teacher...

This is very common in Hebrew. You will often see כש attached as a prefix rather than written separately.

A longer, more formal alternative is כאשר, which also means when:

• כאשר המורה מסבירה לאט

That means the same thing, but כש is more common in everyday Hebrew.

טוב יותר means better.

It is made from:

• טוב = good / well
• יותר = more

So literally it is more good, which functions as better in English.

In this sentence:

• הוא מרגיש טוב יותר = he feels better

Hebrew often forms comparisons this way:

• גדול יותר = bigger
• מהיר יותר = faster
• קל יותר = easier

You may also hear יותר טוב in spoken Hebrew. That also means better.
But טוב יותר is often considered a little more standard or formal.

Because after מרגיש you usually describe the person’s state, not the manner of the action.

Compare the difference:

• הוא מרגיש טוב = he feels good / well
• הוא מסביר היטב = he explains well

In the sentence הוא מרגיש טוב יותר, טוב describes how he is feeling, so it works like a predicate adjective.

By contrast, היטב is an adverb meaning well, and it is used more for how an action is performed:

• היא מסבירה היטב = she explains well

So מרגיש טוב יותר is the natural choice.

Both are in the present tense.

• מרגיש = feels / is feeling, masculine singular
• מסבירה = explains / is explaining, feminine singular

Hebrew present tense often covers both ideas that English separates:

• he feels
• he is feeling

and

• she explains
• she is explaining

In this sentence, the present tense gives a general or habitual meaning:

• He feels better when the teacher explains slowly

So it is not just about one moment; it can describe a repeated situation too.

Because in the present tense, Hebrew usually does not use a separate verb meaning to be.

So Hebrew says:

• הוא מרגיש טוב יותר
  literally: he feels better

and not something like he is feels better or he is better-feeling.

More generally:

• הוא עייף = he is tired
• היא מורה = she is a teacher
• הם בבית = they are at home

In present-tense Hebrew, there is usually no separate word for am / is / are.

Because לאט means slowly, and Hebrew often places adverbs after the verb.

So:

• מסבירה לאט = explains slowly

This word order is very natural in Hebrew.

You can think of it as:

• המורה מסבירה לאט
  the teacher explains slowly

That said, Hebrew word order can be flexible for emphasis, but the version in the sentence is the most neutral and common.

מרגיש comes from the verb להרגיש, which means to feel.

Here:

• הוא מרגיש = he feels

The form מרגיש is:

• present tense
• masculine singular

Other present-tense forms are:

• מרגישה = feeling, feminine singular
• מרגישים = feeling, masculine plural / mixed plural
• מרגישות = feeling, feminine plural

So if the subject were a woman, you would say:

• היא מרגישה טוב יותר

No. מורה is one of those nouns that can be masculine or feminine, depending on the person being referred to.

Even though many Hebrew words ending in -ה are feminine, you cannot rely on the ending alone.

So both of these are possible:

• המורה מסביר = the teacher explains referring to a male teacher
• המורה מסבירה = the teacher explains referring to a female teacher

This is why the verb form is important: it tells you the gender.

A simple pronunciation guide is:

Hu margísh tov yotér kshehamorá masbirá le’at.

A rough breakdown:

• הוא = hu
• מרגיש = margísh
• טוב יותר = tov yotér
• כשהמורה = kshehamorá
• מסבירה = masbirá
• לאט = le’at

A few notes:

• כש at the start of כשהמורה sounds like kshe
• לאט is usually pronounced le-at, with two vowel sounds

Yes, depending on context, כש can sometimes be understood as when or while.

So the clause can feel like:

• when the teacher explains slowly
• when the teacher is explaining slowly
• sometimes even while the teacher explains/is explaining slowly

In this sentence, the most natural English translation is usually:

• He feels better when the teacher explains slowly

But Hebrew present tense is often broader than English, so a small range of translations can fit depending on context.