Clean up the beach after tourists have left the summer resort

Additions, multiplications, divisions ... will test our mental agility over 10 levels, with a survivor gameplay. Kill all zombies resolving math operations and view how fast you are on the stats panel.

Ni Xi Huan Shi Yao ?Qiao Hu Xi Huan Shi Yao ?Qiao Hu Ye Shi Ge Xing Hen Qiang De Xiao Peng You ,Qiao Hu Gen Ni [?] Qi Hu Dong Liao Tian ,You Tian Tian Quan ,Zu Qiu ,Da Lei ,Yao Guai Si Ge Xuan Xiang ,Kan Kan Ni Shi Bu Shi Gen Qiao Hu [?] Yang ?[?] Qi Ke Fu Zhe Xie Que Dian Ba !

The Peril River Watershed is in trouble! Use your scientific reasoning and analytical skills to figure out who is damaging the river, and how to fix it! Also, learn about eutrophication, biomagnification, dissolved oxygen, pH, and the effects of pesticides! A fun virtual lab simulation that focuses on problem-solving, and data analysis skills, including graphing and interpretation of data!

The Time Dogs are hungry and want to be fed, but only at the right time. So be sure they get only matching Clock Bones or they'll be mighty unhappy!