Which of the following would not help in textual comprehension and vocabulary development ?

The correct option is Alphabet charts.

Understanding Textual Comprehension and Vocabulary Development:
Textual comprehension involves understanding, interpreting, and analyzing the meaning of written passages, sentences, and paragraphs. Vocabulary development focuses on expanding a learner's understanding of word meanings, contextual usage, and word relationships.

Analysis of Options:

1. Theme-maps: These are visual graphic organizers that help learners connect key concepts, central ideas, and sub-themes within a text. They directly support comprehension by organizing information and building related vocabulary within specific thematic contexts.

2. Picture dictionaries: These associate images with words, helping learners build contextual understanding and expand their vocabulary visually. They are highly effective for connecting abstract words to concrete representations.

3. Word-maps: These are graphic organizers that help students break down vocabulary words by defining them, finding synonyms, antonyms, and using them in sentences. This directly promotes vocabulary development and text comprehension.

4. Alphabet charts: These display individual letters of the alphabet alongside simple corresponding icons (e.g., 'A' for Apple). Alphabet charts focus primarily on basic letter recognition, phonics, and early literacy skills. They do not aid in comprehending texts or expanding conceptual vocabulary at a reading level.

Therefore, Alphabet charts would not help in textual comprehension and vocabulary development.