We have to find 20 collective nouns in a magazine. So far are all of these collective?

1.partners
2.Birds
3.Family
4.Amphibians
5.Crustaceans
6.builders
7.Immigrants
8.Animals
9.Grades
10.Services
11.packages
12.lodges
13.Members
14.Branches

They are plurals. Collective nouns are different:

http://grammar.ccc.commnet.edu/grammar/plurals.htm#collective_nouns

http://users.tinyonline.co.uk/gswithenbank/collnoun.htm

Many of yours are plural nouns, not collectives. See the link

Most of those are plural nouns, not collective nouns.

http://www.chompchomp.com/terms/collectivenoun.htm

Is we they and them collective?

No. They are pronouns.

You'll find dozens of collective nouns in those websites.

Yeah but we have to find some in a magazine and cut them out. Are these so far collective? Family and flock?

Right.

Is tourists a collective noun? Im not sure for that one

It's a plural noun.

To determine whether a noun is collective or not, we need to consider if it refers to a group or collection of individuals. Here's an explanation of each noun you listed and whether it is collective or not:

1. Partners: Yes, "partners" is a collective noun as it refers to a group of individuals who are jointly involved in a business or activity.
2. Birds: No, "birds" is not a collective noun as it generally refers to multiple individual birds rather than a specific group or collection.
3. Family: Yes, "family" is a collective noun as it refers to a group of people who are related to each other by blood or marriage.
4. Amphibians: No, "amphibians" is not a collective noun as it refers to a class of animals rather than a specific group or collection.
5. Crustaceans: No, "crustaceans" is not a collective noun as it refers to a group of animals rather than a specific group or collection.
6. Builders: Yes, "builders" can be considered a collective noun as it refers to a group of people who build or construct things.
7. Immigrants: Yes, "immigrants" can be considered a collective noun as it refers to a group of people who migrate from one country to another.
8. Animals: No, "animals" is not a collective noun as it refers to multiple individual animals rather than a specific group or collection.
9. Grades: No, "grades" is not a collective noun as it refers to individual levels or scores rather than a specific group or collection.
10. Services: No, "services" is not a collective noun as it refers to multiple individual services rather than a specific group or collection.
11. Packages: No, "packages" is not a collective noun as it refers to multiple individual packages rather than a specific group or collection.
12. Lodges: No, "lodges" is not a collective noun as it refers to multiple individual lodges rather than a specific group or collection.
13. Members: Yes, "members" is a collective noun as it refers to a group of individuals who belong to an organization or club.
14. Branches: Yes, "branches" is a collective noun as it refers to a group of separate divisions or units of an organization or tree.

Based on the above explanations, out of the 14 nouns you listed, 7 of them can be considered collective: partners, family, builders, immigrants, members, and branches. Remember, a collective noun denotes a group or collection of individuals, while a non-collective noun refers to multiple individual items.