Today, will be going over the immune system, external and internal defenses, the immune response and immunity

This is one of the bio subworld's first community events. For those unfamiliar with the game, the host draws a scribble or doodle and the participants guess the object. The theme for our first skribbl is cell organelles. The learner with the most points will get a shoutout in our next announcement!

With the August SAT coming up, sharpen your math skills with this series! Every Wednesday, We'll go over the different domains in SAT math and practice questions to target your weaknesses.

This series will help you master the full unit of [Logarithms](https://www.khanacademy.org/math/algebra2/x2ec2f6f830c9fb89:logs)[](https://www.khanacademy.org/math/algebra2/x2ec2f6f830c9fb89:poly-arithmetic) in Khan Academy's Algebra 2 course! You will go through Khan Academy skills, culminating with you taking the final Unit Test.