Charles Mann & Associates
Catalog visible on Softalk, V1N4 December 1980, page 7
s/n Name    
  THE BASIC TEACHER
...teaches Integer Basic programming to the novice in 12 lessons with sample tests and review sections. Learner writes sample programs with help of a general index. A bonus program, Apple Tricks, teaches peeks, pokes, and calls. 16K, Integer Basic. Cassette $29.95
   
 
  THE TEACHER PLUS
...teaches Applesoft in 18 lessons on 2 disks (cassettes), including sound and graphics. Conversational approach uses Apple reference manuals as supplements. ROM Applesoft. Cassette $34.95