من فضلكم ما معنى كلمة ( حصة احتياطى ) ولكم جزيل الشكر

our class had a sub

reserve of Share

Substitute teacher From Wikipedia

A substitute teacher is a person who teaches a school class when the regular teacher is unavailable(absent) e.g., because of illness, personal leave, or other reasons. "Substitute teacher" is the most commonly used phrase in the United States, Canada and Ireland, while supply teacher is the most commonly used term in the United Kingdom. Common synonyms for substitute teacher include relief teacher (used in Australia and New Zealand), "emergency teacher" (used in the United States), and "sub" (used in the United States and Canada). Other terms, such as "guest teacher", are also used by some schools or districts. Regional variants in terminology are common, such as the use of the term teacher on call (T.O.C.) in the Canadian province of British Columbia and occasional or supply teacher in the Canadian province of Ontario

حصه احتياطى ممكن تكون :
sub lesson period
or
substitute period

اما مدرس احتياطى الموجوده فى التعريف السابق :
substitute teacher
relief teacher
emergency teacher
sub
guest teacher
teacher on call >T.O.C

Really you are an excllent teacher.

extra-period

the share of reserves
spare session
substitute session
Mr \ Tamer Afifi
0127909954

thank u alot sir

substitute teacher

Fantastic !

service period

شكرا شكرا شكرا شكرا شكرا
شكرا شكرا شكرا
شكرا

I have substitution
English Indian Teachers say the above mentioned

Sub lesson
Substitute lesson