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PPT
Curated OER

Biotechnology in Livestock Production

For Teachers 11th - 12th
Genetic engineering as a solution to disease tendencies and growth is presented. Examples are given of its use to research micro-organisms that help or hinder farming.  There are many slides with details of the process in a lab, as well...
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Website
University of Auckland School of Computer Science

Morris: Trees

For Students 9th - 10th
A description of the binary tree data structure.
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Website
National Institute of Standards and Technology (NIST)

Dictionary of Algorithms and Data Structures: Binary Tree

For Students 9th - 10th
The DADS description of the binary tree abstract data structure.