School Prep Guides
Mark Twain IS 239 STEAM Aptitude Test: What It Is, What Changed, and How to Prepare (2026 Guide)
Mark Twain IS 239 has redesigned its Computer/Math and Science talent tests into a new STEAM-Oriented Aptitude format — and most prep resources still describe the old exam. This guide covers exactly what changed, what's on each test, and how your 5th grader can build the reasoning skills the new format demands.
