Background:
Regardless of the social or economic status of a student, it is a fact that math is always present. This discipline is considered as a competitive tool for achieving a more productive life. However, the gap in academic achievement is big. Consequently, in the last decades the research on education has set attention on this point.

Material and methods:
Therefore, this research aims to prove that there is anxiety toward math on high school students at a private institution Rioverde in San Luis Potosí, México and find if there is a difference in regards to gender. We used Auzmendi sub-scale questionnaire.

Results:
The results show that there is anxiety toward math on high school students, and that women show more anxiety toward math than men do.

Conclusions:
Thus, we conclude, for the case under study, that anxiety toward math is a learning issue for high school students, more often for women than for men.