HOUSTON (KTRK) -- A mental math system developed in the 1800's is helping some local students ace standardized tests and win math competitions. But the method isn't taught in most Houston schools.

Struggling with the 11 times table? Don’t worry—you’re not alone. For many secondary school students aged 12 to 16, multiplying by 11 can feel tricky, especially when trying to do it quickly in your ...