tougeikyousitu ni sankasuru.

It is read:

とうげいきょうしつ に さんかする
tōgei kyōshitsu ni sanka suru

A few helpful notes:

• 陶芸（とうげい） = pottery / ceramic art
• 教室（きょうしつ） = classroom, lesson, class, course
• 参加する（さんかする） = to participate, to join, to take part

So 陶芸教室 is one noun phrase: pottery class.

Because 参加する normally takes に for the thing you participate in.

So:

• 陶芸教室に参加する = to participate in a pottery class
• 会議に参加する = to participate in a meeting
• イベントに参加する = to participate in an event

For English speakers, this can feel a little surprising because English uses in after participate. In Japanese, the natural pattern is:

[event / group / activity] + に + 参加する

No, that is not natural Japanese.

With 参加する, the thing you join is usually marked by に, not を.

So:

• 陶芸教室に参加する = correct
• 陶芸教室を参加する = incorrect

This is a very common learner mistake because English speakers often expect a direct object. But 参加する does not work that way in standard Japanese.

Here, 教室 most naturally means a class / lesson / course, not just the physical room.

That is important because 教室 can mean two related things depending on context:

• classroom as a room
• class / lesson group / course as an activity people attend

In 陶芸教室に参加する, the meaning is almost certainly joining a pottery class or taking part in a pottery workshop/course.

So even though the literal pieces could suggest pottery classroom, the natural English idea is pottery class.

参加する is the plain dictionary form.

You often see dictionary form in:

• vocabulary lists
• textbook example sentences
• headings
• notes
• casual plain-style writing

If you wanted a polite sentence, you could say:

• 陶芸教室に参加します。 = I will join a pottery class.
• 陶芸教室に参加しました。 = I joined a pottery class.

So the use of する here does not change the core meaning; it just shows the plain/basic form.

It can be, but it is also a little context-dependent.

As written, 陶芸教室に参加する。 is a plain-form sentence meaning something like:

• (I) join a pottery class
• (I) will participate in a pottery class
• to participate in a pottery class

Japanese often omits the subject when it is understood from context. So this could appear as:

• a simple example sentence
• a diary-style statement
• a list of plans
• a heading or action item

Without context, it can feel slightly like a dictionary-style phrase rather than a fully fleshed-out English sentence, but it is still normal Japanese.

By itself, the plain non-past form 参加する can cover several ideas depending on context:

• habitual/general: join / participate
• future: will join
• dictionary meaning: to join / to participate

Japanese non-past does not map perfectly to a single English tense. Context decides the best translation.

For example:

• In a vocabulary list: to participate in a pottery class
• In a plan: I will join a pottery class
• In a narration style: I join a pottery class

So if the meaning has already been shown to the learner, the important thing is that 参加する is the basic plain non-past form.

Usually, no.

へ is mainly used for direction or destination, like to in the sense of movement:

• 学校へ行く = go to school
• 駅へ向かう = head toward the station

But 参加する is not mainly about physical movement. It is about joining or taking part in something, so に is the normal particle.

So:

• 陶芸教室に参加する = natural
• 陶芸教室へ参加する = unnatural in normal Japanese

It is best understood as a single compound noun made from:

• 陶芸 = pottery
• 教室 = class / classroom

Together:

• 陶芸教室 = pottery class

Japanese often combines nouns directly like this without needing a word like of.

In English, we might say:

• a pottery class
• a pottery workshop
• a ceramics class

In Japanese, noun compounding is very common, so 陶芸教室 is completely natural.

Yes, you might hear or see that, but 陶芸教室に参加する is more compact and more standard as a set noun.

Compare:

• 陶芸教室に参加する = join a pottery class
• 陶芸の教室に参加する = join a class of pottery / a pottery class

Both can be understood, but the compound 陶芸教室 sounds more natural as the name of that kind of class.

Japanese often prefers compact compound nouns when they are established expressions.

They are related, but not the same.

• 参加する = to participate in / join
• 行く = to go
• 入る = to enter / join in some contexts

So:

• 陶芸教室に参加する focuses on taking part in the class
• 陶芸教室に行く focuses on going to the class
• 教室に入る would usually mean enter the classroom, not take the class

If your goal is to say that someone is joining the activity, 参加する is the best match.

Here is the breakdown:

• 陶 = pottery, ceramics
• 芸 = art, craft
• 教 = teach
• 室 = room

So:

• 陶芸 = ceramic art / pottery
• 教室 = classroom, lesson, class

Together they form 陶芸教室, literally something like pottery-art class, which naturally means pottery class.

This kind of kanji breakdown can help you remember vocabulary, but in real use you should learn 陶芸 and 教室 as whole words too.