Cold Spring Harbor Laboratory
Sex Cells Have One Set of Chromosomes; Body Cells Have Two
What's the difference between body cells and sex cells? Learners explore the question and the process of meiosis using an interactive lesson. An animation describes the discovery of meiosis and describes its phases for a detailed and...
Curated OER
"Rikki-Tikki-Tavi"
Students explore nature by reading stories in class. In this animal characteristics lesson, students read the story "Rikki-Tikki-Tavi," by Rudyard Kipling and identify the different animals mentioned in the book. Students review the...
Curated OER
The Wrights' Flight: History Through Primary Sources
Students read primary source material about the Wrights' first flight such as a journal and a telegram. For this The Wrights' Flight lesson, students select the most reliable primary source and compare the pros and cons of using primary...