Handout
National Institute of Open Schooling

Chemical Bonding

For Students 7th - 12th Standards
Name is Bond, covalent bond. Through readings and answering questions, classes explore the different types of chemical bonds, their characteristics, valence shell electron pair repulsion theory, and atomic orbitals. 
Handout
University of St. Andrews (UK)

University of St. Andrews: Physics and Astronomy: Electric Potential and Charge

For Students 9th - 10th
From The Scots Guide to Electronics web site. The meaning of electric potential is described. A combination of diagrams and words are used to explain this difficult concept without the use of mathematics. Very well done!