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J
John Mistretta

John Mistretta

AI trainer and data annotation specialist with excellent writing skills

USA flagWorcester, MA, Usa
$25.00/hrEntry LevelDoccanoLabel StudioOther

Key Skills

Software

DoccanoDoccano
Label StudioLabel Studio
Other

Top Subject Matter

No subject matter listed

Top Data Types

DocumentDocument
ImageImage
TextText

Top Task Types

Bounding BoxBounding Box
ClassificationClassification
Emotion RecognitionEmotion Recognition
Evaluation/RatingEvaluation/Rating

Freelancer Overview

I'm an experienced educator and instructional coach with over 25 years in U.S. elementary and middle school classrooms, including 5th grade ELA. I'm proficient in evaluating student writing for clarity, grammar, and grade level, as well as designing and administering rubric-based assessments aligned to Common Core standards. In 2025, I began training in AI evaluation and data labeling, completing projects in Label Studio that involved classifying and scoring text generated by large language models. I'm comfortable analyzing detailed output, identifying inconsistencies, and writing structured feedback to guide improvement. My ability to combine content knowledge and AI evaluation makes me well equipped to assess educational content with accuracy and attention to detail. I

Entry LevelEnglish

Labeling Experience

SMS Spam Classifier

OtherTextClassification
Labeled and categorized SMS messages as spam or ham to create a training dataset for a supervised machine learning model. Applied text preprocessing and feature extraction techniques (CountVectorizer), then evaluated model performance using Naive Bayes and Random Forest classifiers. Gained hands-on experience with binary classification, text labeling, and data preparation workflows.

Labeled and categorized SMS messages as spam or ham to create a training dataset for a supervised machine learning model. Applied text preprocessing and feature extraction techniques (CountVectorizer), then evaluated model performance using Naive Bayes and Random Forest classifiers. Gained hands-on experience with binary classification, text labeling, and data preparation workflows.

2025 - 2025

Prompt evaluation of LLM responses using custom rubric

OtherTextClassification
Self-directed project. Labeled sample AI responses based on specific criteria: accuracy, completeness, and helpfulness. Performed annotations via rating and by ranking tasks

Self-directed project. Labeled sample AI responses based on specific criteria: accuracy, completeness, and helpfulness. Performed annotations via rating and by ranking tasks

2025 - 2025

Education

W

Worcester State University

Bachelor of Science, Business

Bachelor of Science
Not specified
N

National-Louis University

Bachelor of Arts, Education And Mathematics

Bachelor of Arts
Not specified

Work History

R

R.E. Shaw Elementary School

Math & Science Instructional Coach / Specialist

Millbury, MA
2014 - Present
O

Our Lady of the Angels School

Grade 5 ELA & Math Teacher

Worcester, MA
1993 - 2014