Lessons 17 · 1 lessons · O. A. Qo‘ysinov, O‘. O. Tohirov, D. N. Mamatov, D. F. Aripova. Labour education (Mehnat ta’limi), Grade 9: methodical guide for teachers. Delta-Print, Tashkent, 2017. Note: this is a teacher’s guide, not a student textbook (lesson plans for the “Technology and design”, “Service” and “Basics of agriculture” directions). The course is built from the lesson-plan topics of the “Technology and design” direction; the “Iroqi” skullcap lesson comes from the “Service” direction, and lesson 25 (joining parts) is written from the topic listed in the guide’s calendar plan.
Answers are for parents and teachers.
1
For a school item (notebook, pencil) write at least four quality signs and say how they could be checked.
Your own work
2
Compare non-destructive and destructive methods in a table with an example each.
Your own work
3
5 of 250 items are defective. What percentage is defective?
2
4
Why is the sample deliberately broken in some tests? Write 3 sentences.