This is my attempt to match the 2008 Primary Science syllabus of the Ministry of Education, Singapore with online resources ... internal links (+ similar and/or complementary resources) are in the left column and external links on the right.
PLANT SYSTEM
EXTERNAL LINKS
Identify the different parts of plants and state their functions.
Recognise that an electric circuit consisting of an energy source (battery) and other circuit components (wire, bulb,
switch) forms an electrical system.
Blobz Guide to Electric Circuits
(1) What makes circuits work? (2) Conductors & insulators (3) All about switches (4) Changing circuits (5) Circuit diagrams