Alarm clock on the table with a female teacher wearing a facemask while lecturing in the background

Related tags:

• teacher teaching
• school teacher
• class
• teaching
• classroom
• teacher
• mathematics
• school
• academic
• educational
• reloj
• alarm clock
• hour
• knowledge
• timer
• female teacher
• alarm
• girl
• female
• formula
• gloves
• safety
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