MY APPROACH TO TEACHING and to the offered UNITS on this website is to pepper the worksheets (and, optionally, the quizzes) with informational guides that serve as text-book-like how-to instructions. How the teacher puts it all together is left to that teacher's unique approach to teaching. In other words, these offerings are PROBLEM-BASED and not lesson-plan based. The difference is profound. I do not pretend to know how you should speak to your students and refuse to offer canned lesson plans--the material will serve as your own guide as well as for the students themselves.
Nets (both detecting whether or not you have one and actually constructing or sketching them) help develop spacial sense. Orthogonal drawings are a good complement to that, I have found.
This unit concerns all three concepts above. THREE skill areas thus included.
FOUR worksheets are provided: one with 25 problems per skill; one with 20 per skill; one with 15 problems per skill and one with 10 per skill. You decide which is best for you.
SEVEN quizzes (all with 20 problems each) are provided: TWO at a level 2 (not too hard); TWO at a level 3 (harder); TWO that are a mix of level 2 and 3 problems (I personally use these a lot) and one that has both level 3 and level 4 (the hardest).
[The problems in All WORKSHEETS and PREVIEWS are printed in difficulty (1 [easy], 2 [not so easy], 3 [proficiency] up to 4 [mastery]) order within a skill. The actual difficulty level appears slightly to the left of the DK box of each problem in a very small font. Also, instructional references appear on worksheets but are optional on quizzes.]
You might also want to check out other 6th grade offerings here. The 6th Grade Summary
will link to several units and special categories of questions.
I can’t stress too strongly that all of these units have been designed and tinkered with from extensive experience with older students who had absolutely no understanding of these various concepts at all.