"Phones (if students have them) have apps which make solving the math problems too easy, scan the problem and the steps and solution are displayed"
If teaching is obsoleted by technology then it is teaching that must change not the technology.
>>faissa+(OP)
The material is not obsoleted. We wouldn't say that literacy was useless because phones can read off everything to us. Why would we say the same about K-12 mathematics?
>>Jtsumm+Pa
Phones can read things to us but it's grossly inefficient and alot of literacy is about reading comprehension. The same can't be said for most of K-12 mathematics.