664,984 views
Want a daily email of lesson plans that span all subjects and age groups?
Learn more573,974 views
691,009 views
561,907 views
302,578 views
848,803 views
375,503 views
2,269,969 views
1,216,033 views
673,604 views
1,835,371 views
2,618,216 views
1,241,116 views
5,777,292 views
8,683,236 views
2,313,435 views
3,994,084 views
2,191,925 views
645,965 views
7,540,265 views
Can you solve the famously difficult green-eyed logic puzzle?
lesson duration 04:42
14,173,176 views
406,795 views
994,404 views
435,457 views