Let’s Solve and Graph this Basic Inequality – Step by step…

TabletClass Math:


Math Notes:

[henkhu]

At 4:50 the < symbol changes into the > symbol. Ok, but where is the explanation? What you teach is very often a trick. Students perform the trick without understanding what they are doing. And that is the cause of many fails for exams. Because they will also use the trick in situations where it is not allowed. Why: you did not teach the students why what they have to do is correct. It is hocus pocus, and math is not hocus pocus.