Mr. Sinn Channel - Blog

Investigation 01 of the Population Pyramid Lab: the Niger and Japan pyramids side by side with their dependency ratios, and the first question on the right

Latest post September 10, 2026 APHG Teachers The Population Pyramid Lab A free Unit 2 activity built on 12 investigations. Students compare two real population pyramids, read the demographic data underneath, and grade their own answers against the scoring criteria. Read the post

A guide cover reading How to succeed in your first AP class, 10 tips for the school year

September 3, 2026 APHG Students How to Succeed in AP Human Geography AP Human Geography is many students’ first AP class. These 10 practical tips will help you adjust to the faster pace, study more effectively, and earn a grade you are proud of. Read the post

A case open in the Unit 0 Research Study Challenge: the study on the left and a Level 4 question with the student's typed answer on the right

September 1, 2026 AP Psych Teachers Unit 0: The Research Study Challenge A free Unit 0 activity built on 22 real studies, experiments and headlines. Five leveled science practice questions per case, and students grade their own work before they turn it in. Read the post

One case from the AP Psychology activity: a news headline and article on the left, and two questions with answer boxes on the right

August 9, 2026 AP Psych Teachers The Summer 2026 Case Files: AP Psychology A free, no-login lesson built on 24 real news stories. Students pick their cases off a unit map and start thinking like psychologists before you have taught a single unit. Read the post

One case from the AP Human Geography activity: a news headline and article on the left, and two questions with answer boxes on the right

August 9, 2026 APHG Teachers The Summer 2026 Case Files: AP Human Geography The same lesson, built for geography. Twenty-four summer news stories on a world map, each carrying the CED concepts students need before they answer a question. Read the post