# OpenStax_CNX

You are here: Home » Content » Sam's envelope (Part 2)

### Lenses

What is a lens?

#### Definition of a lens

##### Lenses

A lens is a custom view of the content in the repository. You can think of it as a fancy kind of list that will let you see content through the eyes of organizations and people you trust.

##### What is in a lens?

Lens makers point to materials (modules and collections), creating a guide that includes their own comments and descriptive tags about the content.

##### Who can create a lens?

Any individual member, a community, or a respected organization.

##### What are tags?

Tags are descriptors added by lens makers to help label content, attaching a vocabulary that is meaningful in the context of the lens.

#### In these lenses

• GETIntPhaseTech

This module is included inLens: Siyavula: Technology (Gr. 4-6)
By: Siyavula

Review Status: In Review

Click the "GETIntPhaseTech" link to see all content selected in this lens.

Click the tag icon to display tags associated with this content.

### Recently Viewed

This feature requires Javascript to be enabled.

### Tags

(What is a tag?)

These tags come from the endorsement, affiliation, and other lenses that include this content.

# Sam's envelope (Part 2)

Module by: Siyavula Uploaders. E-mail the author

## SAM’S ENVELOPE (PART 2)

Activity 1 (continued from Module 13)

Bring a used envelope to school. Open it carefully to see how it is constructed.

An opened envelope looks almost like a rhombus (a geometrical figure with four sides that are the same length). The only difference is that one corner is cut off and four notches are made to fold the envelope in.

Use all the processes (a - h).

Decide in advance how you will paste the envelope. (You can try it on blank A4 paper.)

You may adjust the measurements according to the following example:

a)

Place the square in front of you as shown above.

Write the letters a, b, c, d on the corners.

b)

Measure the distances as indicated and lightly draw the two horizontal lines.

c)

Measure the distances as indicated and lightly draw two vertical lines.

Number the corners 1,2,3,4.

d)

Draw hard lines at a,1; 1, b; b,2; 2,c; c,3 etc.

Make crosses to indicate the waste.

Draw small lines on lines 1,2; 2,3, etc. Use a sharp pencil to indicate the folds.

e)

Checkpoint

Come, show me.

Use a safety scissors to cut along lines a1, b1, b2, c2, etc.

Throw the small pieces into the wastebasket.

f)

Use a safety ruler and a sharp folder to flatten the folding lines.

Press the ruler down hard.

Be standing when you use the folder.

g)

First fold b to the inside, then a and lastly c.

h)

Draw a fine line to show where you must apply glue.

Too much glue will press out and look untidy.

Rub all the corners and sides.

Assessment

LEARNING OUTCOME 1 : Technological Processes and Skills

The learner will be able to apply technological processes and skills ethically and responsibly using appropriate information and communication technologies.

Assessment Standard

We know this when the learner:

1.7 briefly outlines a plan for making, listing the main steps;

1.8 uses suitable tools and materials to make products by measuring, marking out, cutting simple forms in a variety of materials, and joining them, using a range of techniques;

1.9 works neatly and safely.

## Content actions

PDF | EPUB (?)

### What is an EPUB file?

EPUB is an electronic book format that can be read on a variety of mobile devices.

My Favorites (?)

'My Favorites' is a special kind of lens which you can use to bookmark modules and collections. 'My Favorites' can only be seen by you, and collections saved in 'My Favorites' can remember the last module you were on. You need an account to use 'My Favorites'.

| A lens I own (?)

#### Definition of a lens

##### Lenses

A lens is a custom view of the content in the repository. You can think of it as a fancy kind of list that will let you see content through the eyes of organizations and people you trust.

##### What is in a lens?

Lens makers point to materials (modules and collections), creating a guide that includes their own comments and descriptive tags about the content.

##### Who can create a lens?

Any individual member, a community, or a respected organization.

##### What are tags?

Tags are descriptors added by lens makers to help label content, attaching a vocabulary that is meaningful in the context of the lens.

| External bookmarks