Systematic
な adjective
The body of the lineage is part of a bigger system. Add 的 to it, and you have systematic.
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.
私達は、体系的な日本語学習教材を提供しています。
We are offering systematic Japanese learning material.