This means the first lesson of the day.
It is first period ( usualy half of the school year) First lesson should to be - somo la kwanza.
Not necessarily. Kipindi is a period of time, so I guess this could be the first period of the day, or it could be the first term, depending on that magical thing called context that this course so often lacks.
A foot ball game has two halves. So, I know is that the translation for the "First half" is "Kipindi cha kwanza"