We went through the midterm test. A few concepts were missing in his approach, like absolute value and a mistake with adding negative numbers.
Spent a bit of time on changing fractions by multiplying by one as a fraction using a number divided by itself. Talked a while about reciprocals and a few applications.
For example, if you have 12/36 then the reciprocal is 36/12. 36/12 is 3 which could be expressed as 3/1. The reciprocal of that is 1/3. 12/36 = 1/3