The prime minister wants to create a new qualification called the "Advanced British Standard".
Bloomberg reports the PM will unveil his policy gambit with "an over-sized set on 10 Downing Street’s lawn".
Stephen Follows described the policy as "misguided and tone deaf".
The former shadow chancellor dropped the subject after sitting his O-Levels in the 1980s.
The students did not seem as excited about maths as the prime minister.
Conservative ministers first suggested there was a problem with maths in the UK back in 2012.
The prime minister will say numeracy is "every bit as essential as reading".
"They’ll all be able to count how many hours people have to wait in A&E and just how underfunded the NHS is."
Schools should treat this issue with "real concern".