Lesson 4. Students work with a conductivity sensor

The table is filled in, but the data is not calculated manually, but using the Arduino controller

Measurements can be carried out with water from different sources:

• water from the cooler
• tap water
• boiled water
• distilled water

Let’s conduct experiments to measure the electrical conductivity of water using the developed sensor

Water source	Electrical conductivity index	Electrical conductivity indicator when adding soda or salt

 

Assessment of learning outcomes

Project presentation structure

Students create, during lessons in groups of 2 to 4 people, the proposed STEM project “Determination of water quality to understand the influence of humans”

Structure and protection of the project

The project consists of the following structural elements:

1. Presentation (authors, problem, idea, method of solution, conclusions, prospects are indicated).
2. Prototype (created a working prototype of the project during the lessons).
3. Answering questions during the defense (project presentation skills and understanding of its relevance)

Project Evaluation Criteria

	Evaluation criteria	Points	Comments
1	Formulation of the research problem. Significance and relevance of the problem
2	Correspondence of the set problems, goals and objectives to the subject of the project
3	Structuring the content of the project: consistency and consistency
4	Correspondence of the content to the subject of the project: – the degree of disclosure of the problem; – compliance with the plan.
5	Working prototype
6	Teamwork during the work on the project, the distribution of rolesduring the defense
7	Oratory
8	Answers on questions
9	Creativity
	Number of points

The following criteria are distinguished for evaluating project work:

1 point – not implemented;

2 points – implemented partially;

3 points – fully implemented.

The maximum number of points for the project is 27 points.

It is recommended to transfer the sum of points for work into traditional evaluation norms according to the following scheme:

Rating “5” (excellent) is given for the amount of 22-27 points. Rating “4” (good) corresponds to the sum of 16-21 points.

Grade “3” (satisfactory) corresponds to the sum of points 11-16 points