Bing found the following results
Tefillin - Wikipedia
What Are Tefillin? - Chabad.org
Tefillin - Jewish Virtual Library
Purchasing Tefillin - A Buyer’s Guide - Chabad.org
Tefillin and Its Significance - Chabad.org
What Are Tefillin in Judaism? - Learn Religions
What are Tefillin and how does one wear them?
How to Put on Tefillin | My Jewish Learning
BBC - Religions - Judaism: Tefillin
What Do Tefillin Do? - Jewish Theological Seminary