I am attempting to write lesson plans for my fourth grade Virginia history class. This week, I will teach how money, barter, and credit were used in the Virginia colony. Include fun and creative games to help the students learn the concepts.
Here's a sample lesson plan for teaching about money, barter, and credit in the Virginia colony:

Objective:

Students will be able to understand the concepts of money, barter, and credit and how they were used in the Virginia colony.


Materials:

Coins and bills of different denominations
A list of goods and services
Play money or Monopoly money
Introduction (15 minutes):

Start by asking students what they know about money and how they use it today.
Discuss the importance of money and how it makes transactions easier and more convenient.
Introduce the concepts of barter and credit, and ask students to think of situations where they would use each one.


Money and Barter (30 minutes):

Divide students into groups and give each group a set of coins, bills, and a list of goods and services.
Have them practice bartering with each other using the items on the list. For example, one student might trade a toy for another student's snack.
After several rounds of bartering, have them compare their experiences to using money. Discuss the advantages and disadvantages of each system.


Credit (20 minutes):

Give each student a set of play money or Monopoly money.
Explain the concept of credit, using a store as an example. Have them role-play as customers and merchants, making purchases and keeping track of what they owe each other.
Have students discuss their experiences and how credit works in the real world.


Conclusion (10 minutes):

Summarize the key points covered in the lesson and ask students to reflect on what they learned.
Ask them to explain the difference between money, barter, and credit, and why they think one system is more efficient than the others.


Assessment:

Observe students during the role-playing activity and ask questions to gauge their understanding of the concepts.
Have students write a short paragraph explaining what they learned about money, barter, and credit in the Virginia colony.
Note: You can modify this lesson plan according to your classroom and student needs.
How many people should be in each group? The class has 20 people.
Your groups should be sufficiently large to have multiple battering rounds happening with diversity, however small enough for all students to have at least one round of discussion with each of their other group members.
You should also consider making groups of pair number of students to avoid one being left out while the other are having bilateral discussions.
I would suggest making groups of either 4 or 6 students. Nevertheless, considering your class is not divisible by 6, in my opinion, having five groups of 4 would be the best option.