What do you say to mean "The subject X is taught in the n-th time slot of the day"?

Question

I assume that in English schools a number of subjects are taught in a day, like

What are standard phrases to express these? What I can think of are:

Are these correct? And/or are there other phrases commonly used?

If by English schools you mean schools in England note that we study maths not math which they study in the US. — mdewey, Sep 9, 2022 at 10:49
@mdewey i think sundowner means english speaking schools not english as in england — BCLC, Sep 9, 2022 at 10:51
@mdewey Actually I meant just English-speaking, but you mean "maths" is used in England (only? not in other parts of UK?)? How about in writing a time table, say. Do people just write Mathematics (i.e. maths is exclusively colloquial - actually my browser warns maths is a misspelling...)? — sundowner, Sep 9, 2022 at 12:21
I think maths is universal in the UK and possibly in some other anglophone countries. People would write it in full in a timetable, title of a degree and so on but a student would say "We have double maths on Friday afternoons" or say "I am doing Maths, Further Maths and Physics at A-level" or say "I am no good at maths". — mdewey, Sep 9, 2022 at 12:35

BCLC · Accepted Answer · 2022-09-10 13:34:36Z

Note: Don't forget to upvote the question too!

I think the word you're looking for is period.

Eg1:

I have English for 1st period, Maths for 2nd period and Science for 3rd period.

Eg2

Even Stevens

I'm not sure if 'hour' is incorrect, but I so far haven't heard at least in American English. Maybe in British English they say hour?

Updates based on comments:

No, in the UK we too use the word "period" – Peter Jennings
You might also use "block", if there are fewer ...periods....during the day. I'd say that might be more common in high school/college than lower schools, since there are typically fewer slots as the classes tend to be longer. – BruceWayne
At my high school in Michigan in the 2000s, class periods were always called "hours" instead of "periods." Maybe it varies somewhat randomly. – Tanner Swett
To me (Australian ESL), "block" would suggest a time slot which is usually/normally/etc multiple periods; eg. if there are 2 periods before recess, one might say "morning block" to refer to periods 1 and 2 collectively, perhaps on a day with a special program, or a year level which uses them for double periods, or in contexts where the lessons themselves are not directly relevant. – Jiří Baum
At my high school in New York, class periods were 40 minutes with 5 minutes for changes between classrooms, so we definitely would not have said "hour". – David K

You might also use "block", if there are fewer ...periods....during the day. I'd say that might be more common in high school/college than lower schools, since there are typically fewer slots as the classes tend to be longer. — BruceWayne, Sep 9, 2022 at 20:06
At my high school in Michigan in the 2000s, class periods were always called "hours" instead of "periods." Maybe it varies somewhat randomly. — Tanner Swett, Sep 9, 2022 at 23:25
To me (Australian ESL), "block" would suggest a time slot which is usually/normally/etc multiple periods; eg. if there are 2 periods before recess, one might say "morning block" to refer to periods 1 and 2 collectively, perhaps on a day with a special program, or a year level which uses them for double periods, or in contexts where the lessons themselves are not directly relevant. — Jiří Baum, Sep 10, 2022 at 11:13

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