This lesson made by Michael New is on time signatures, how they work, and some simple methods on how to make sense of them.
The teacher covers some of the simple time signatures like 4/4, 3/4, 2/2, 5/4, etc. and tries to lay some foundation for the more complex ones like 6/8 or 9/8. A lot of teachers and textbooks make these a lot harder than they should be.
The time signature (also known as meter signature, metre signature, or measure signature) is a notational convention used in Western musical notation to specify how many beats (pulses) are to be contained in each measure (bar) and which note value is equivalent to one beat.
In a music score, the time signature appears at the beginning, as a time symbol or stacked numerals, immediately following the key signature or immediately following the clef symbol if the key signature is empty. A mid-score time signature, usually immediately following a barline, indicates a change of meter.
Full Wikipedia Article about Time Signature
Hope it helps my dear Steemit family !