Encouraging children to develop the ability to self-assess their work is an important aspect of fostering independence, critical thinking, and personal growth. Here are some strategies to help children learn to judge their own work:

1. **Set Clear Criteria**: Before starting any assignment or task, clearly outline what success looks like. This could be in the form of a rubric, checklist, or set of criteria that the child can refer to while working.

2. **Model Self-Assessment**: Demonstrate how you assess your own work. Talk through your thought process out loud as you go over something you've written or created, showing them how you identify strengths and areas for improvement.

3. **Use Rubrics and Checklists**: Provide children with tools they can use to evaluate their own work. These should be age-appropriate and straightforward. For younger children, simple checklists might suffice, while older children can handle more complex rubrics.

4. **Reflective Journals or Discussions**: Encourage children to keep a journal where they reflect on their learning experiences, or have regular discussions about what they learned and how well they think they did. This can be done after completing a project or at the end of each week.

5. **Self-Grading Practice**: Allow children to grade their own work based on the criteria provided. This can be followed by a discussion about why they gave themselves certain grades and whether they agree with the final assessment.

6. **Peer Assessment**: Introduce peer assessment activities where children evaluate each other’s work. This not only helps them learn to judge others' work but also reinforces their own understanding of what constitutes good quality work.

7. **Provide Feedback on Their Assessments**: When children assess their own work, provide constructive feedback on their evaluations. Highlight what they got right and gently guide them on how they might improve their self-assessment skills.

8. **Encourage a Growth Mindset**: Emphasize that mistakes and areas needing improvement are part of the learning process. Encourage a positive attitude towards self-improvement rather than focusing solely on perfection.

By integrating these practices into daily learning activities, children will gradually become more adept at assessing their own work, which is a crucial skill for lifelong learning and personal development.