Take a look at the Chewa-Chinyanija section. The language appears to be the same (different names for the same language).

Chichewa student's manual volume 1

Chichewa student's manual volume 2

Chichewa teacher's manual

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Chichewa: introduction manual

Introduction	Lesson 1	Lesson 2	Lesson 3	Lesson 4
Lesson 5	Lesson 6	Lesson 7	Lesson 8	Lesson 9
Lesson 10	Lesson 11	Lesson 12	Lesson 13
Dialogue 1	Dialogue 2	Dialogue 3

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