There's no definitive, globally recognized registry of "P-TECH" schools. The P-TECH model (Pathways in Technology Early College High School) is a *model* of education, not a specific organization or franchise. While the original P-TECH school was established in New York, many schools around the world have adopted variations of the P-TECH model. Therefore, there's no single number representing the total count.
To find a number, you'd have to research individual countries and regions to see how many schools claim to use or adapt the P-TECH model. This would be a large undertaking and the result would likely be an estimate, not a precise figure.