• How to use adjectives (ESL About)

How to Use Adjectives in English (thoughtco.com)

Participle - bored vs. boring

• Explanation of participle adjectives

Participle Adjectives (perfect-english-grammar.com)

• Short quizzes (ESL Quiz)

ESL Quiz - Participles (Larry Davies) I-TESL-J (a4esl.org)

Comparative / Superlative

• Comparatives and superlatives for beginners (ESL About)

Comparative and Superlatives for Beginners (thoughtco.com)