"As for the team with the most points and outstanding performances all through the exercise, I have decided to award them with the points for every beast they had killed." Major Reeves said shocking the other teams.
The school had informed the students that they would gain points from the beasts they killed when the beast tide began. Meaning that since this was training in preparation for the main event they wouldn't be getting any points no matter how many beasts they killed.
So what major Reeves' statement meant was that Blake's team would be getting outrageous exchange points from every exercise they had done. Which included the first exercise where they used the elemental cannon, the 4th exercise where they used the mana cannons, and the final exercise that involved both killing their way through an army of beasts and Tessie killing tens of beasts in the process of defending herself.