1. building central ideas

2. If we think of generalizations according to ‘levels’
of sophistication, then we can look at what
characteristics differentiate Level 1 (less
sophisticated) to Level 3 (sophisticated)
generalizations.
(Erickson, 2001)
2

3. Level 1
All living things go through life
cycles.
3

4. Level 2 (Add a how)
Living things depend on each others’
life cycles.
4

5. Level 3 (Add a why)
Living things depend on each
others life cycles in order to
survive.
5

6. Level 3 (Add a why)
Living things depend on each
others life cycles in order to
survive.
5