When assessing proficiency in LibreOffice Calc, the following topics can be considered:

1. Basic Functions:
   - Understanding and using basic mathematical functions (e.g., SUM, AVERAGE, MIN, MAX)
   - Working with logical functions (e.g., IF, AND, OR)
   - Using date and time functions

2. Formulas and Cell Referencing:
   - Creating and editing formulas
   - Absolute and relative cell referencing
   - Working with range names

3. Data Organization and Manipulation:
   - Sorting and filtering data
   - Using data validation and conditional formatting
   - Utilizing data grouping and outlining

4. Data Analysis and Visualization:
   - Creating charts (e.g., bar, line, pie charts)
   - Adding titles, labels, and legends to charts
   - Applying chart formatting and customization

5. Data Import and Export:
   - Importing data from external sources (e.g., CSV, text files)
   - Exporting data to different file formats (e.g., PDF, Excel)

6. Advanced Functions and Features:
   - Using lookup and reference functions (e.g., VLOOKUP, HLOOKUP)
   - Working with array formulas
   - Utilizing conditional functions (e.g., SUMIF, COUNTIF)

7. Data Analysis Tools:
   - Using goal seek and solver for optimization
   - Performing data analysis with pivot tables
   - Applying filters and creating subsets of data

8. Collaboration and Data Protection:
   - Protecting sheets and workbooks with passwords
   - Sharing and collaborating on spreadsheets
   - Tracking changes and managing comments

9. Automation and Macros:
   - Recording and running macros
   - Creating custom functions with macros
   - Applying automation techniques to increase productivity

10. Advanced Formatting and Page Layout:
    - Formatting cells (e.g., number formatting, alignment)
    - Working with styles and templates
    - Setting up page layout for printing

This assessment covers a range of essential skills and concepts in LibreOffice Calc. It evaluates the understanding, application, and efficiency in using these features within the software. Assessments include practical exercises, projects, or tests that require participants to demonstrate their ability to perform tasks related to these topics.