Tinkerclass (Week 2 Day 4): Improve & Retest (encore)

It's day 4 of TINKERCLASS--the improve and retest phase. See what you need to improve your speed! Then, test it again, and again and again and share your results with us! This week's project features the Wow in the World episode, Rat Race! See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.