US Patent awarded for a 3D Periodic Table

Over the years I’ve seen many renditions of the periodic table (some of which have even been in three dimensions) and here’s the latest reincarnation. US Patent 7938646 for a three-dimensional periodic table was awarded to Michael Aldersley on May 10th...

10 Ways to Improve the AP Chemistry Exam

1. Print the point value of each question (and part question) on the exam paper. This would act as a helpful guide to both students and teachers when assessing what to write in each response. The argument I have heard against this is that the graders do not want to...

2011 AP Chemistry Exam – Free Response Comments

An ODD year this year. Normally I have kids leave the exam (literally) saying that they were disappointed that they had not been challenged more. This year a few of my very best kids came to see my afterwards, saying that the exam was really hard and that they had...