Here is an alternative Mathspeak logo, created by the PGO “Nedka Ivan Lazarova” school in Rousse, Bulgaria:
“The letter “M” contains the main parts of the MathSpeak acronym. For M it is obvious, and for S is obtained by turning the letter 90 degrees to the left. ∑ is a letter of the Greek alphabet and is pronounced much like Latin S.
In mathematics, the summation is the addition of a sequence of numbers; the result is their sum, reflecting the profound meaning of collecting ideas on the principle of the dialectic triad (thesis-antithesis-synthesis), and the desire of all participants in the project to create a useful and worthwhile intellectual product.
The whole vision of the logo is complemented by the male and female beginnings, visualized by a male and female figure, gently embedded in the M symbol and creating a sense of style and creativity.”