Here's a breakdown:

* DNA Template Strand: During transcription, RNA polymerase uses one strand of DNA as a template to build a complementary RNA molecule. This strand is called the template strand.

* Direction of Movement: RNA polymerase moves along the template strand in a 3' to 5' direction. This is because it adds nucleotides to the growing RNA molecule at its 3' end.

* RNA Molecule Synthesis: As RNA polymerase moves, it reads the template strand and builds the RNA molecule in a 5' to 3' direction.

Think of it like this:

* DNA: The blueprint.

* RNA polymerase: The builder.

* Template strand: The blueprint's instructions.

* RNA: The building material.

The RNA polymerase "reads" the template strand and uses its information to create a new RNA molecule.