ESL Vocabulary Worksheets, Tracing and Spelling words. Learn English language vocabulary by tracing words on the worksheets. Look and the pictures on each worksheet and learn new ESL vocabulary on: animals (horse, rat, cat, dog etc), farm animals, wild animals, birds, clothes, colors, electronics, insects, sports and more. These worksheets are printable PDFs, colorful and appealing to children learning ESL. They are also useful supplementary TEFL materials for teachers or parents helping their kids with English language vocabulary.