Further to the above, it looks like Schuler Tuning may be terminated with extreme prejudice....
Anyhow, vector addition, basic trigonometry (sine cosine tangent) plane triangles, isoceles triangles, air density, fluid behaviour. That sort of stuff will cover you for met and POF at least. Some subjects you simply have to learn, like air law and operations, some are practical, and you can even answer some nav questions without doing any calculations at all
Your school must officially check your abilities in the subjects you mention, by the way - they shouldn't be doing just English if you are walking in off the street. We don't do it officially because students come to us with a PPL, which is slightly different.
Phil