I looked at the EPGY math curriculum for logic and set theory, and the only classes I could find had prerequisites of pre-calculus.
I meant the EPGY K-7 math curriculum. For example, grades 5-6
http://epgy.stanford.edu/courses/math/M0WC/ cover
Multiplication and Division
Introduction to Plane and Solid Geometry
Sentential Logic and Sets
Operations on Fractions and Mixed Numbers
Decimal Arithmetic; Percentages
Functions and Graphing
Area and Volume
Prime Numbers; Factors and Multiples
Probability
If your child does EPGY math there will be some overlap with school math but also some unique topics.