If anyone out there uses Everyday Mathematics or is involved in its creation, perhaps you can help me out. I am looking at the Teacher's Manual for grade 3, Volume 1. I am stumped about the meaning of the words used for the skill and concept development level for a particular "exposure". This information can be found in the Scope and Sequence Chart beginning on pg. 489. The words used for skill and concept development are "beginning" exposure, "developing" exposure, and "secure" exposure. Each of these different types of exposures are correlated to a box filled in with 3 different shades of blue- lightest blue for "beginning", medium blue for "developing", and darkest blue for "secure". I get how to read the Scope and Sequence chart using these filled in boxes. However, I am pretty clear about what "beginning", "developing" exposures mean.
But what does "secure exposure" mean?
*Does it mean that mastery is acheived or expected at this level?
*Does it mean that the student's exposure to a particular skill or concept is high? In other words, that the student has many opportunities to work at that skill or concept?
* If so, how many of these opportunities are considered a "high" number?
I would appreciate your imput. I am trying to see if I have to supplement this textbook in any way, or if it provides me and the students with enough practice and work in certain areas of math.