"Teachers" is the plural form, referring to more than one teacher, as in "The teachers are planning a field trip." "Teacher's" is the possessive form, indicating something that belongs to a single teacher, such as in "The teacher's book is on the desk." Use "teachers" when talking about multiple educators and "teacher's" when indicating possession by one educator.
What kind of teachers
No, teachers should not use student bathrooms.
Teachers teach fractions to their students.
Teachers can use spreadsheets to teach their class about using spreadsheets. But, more likely, teachers use spreadsheets to hold data on their pupils progress in a database form.
He tried all his teachers' patience.
I think they do. Most of the teachers I have use math. Almost everyone (including me!) uses math.
Teachers use scientific notation to compute very large or very small numbers.
Teachers use scientific notation to compute very large or very small numbers.
Is the periodic table used for Math teachers?
none they don't count as real teachers to the government
teachers
Rulers? .... :]