This field guide was used as a basis for documenting classroom events at five community school sites in Papua New Guinea, as part of the Indigenous Mathematics Project in its ongoing research into primary mathematics learning. Methodology for evaluating the appropriateness of curriculum form and content is described and specific sections focus on ordering materials, the lesson packet, and the school in the community. The section on the lesson packet contains explicit instructions on interviewing the teacher, recording classroom activities, taking field notes, and interviewing students, and includes codes for noting classroom organization, language shifts, classroom interaction, and classroom talk. In the section on the school in the community are instructions for describing such factors as the physical setting, materials and resources, classroom activities, and language use in the community. One appendix contains sample field notes, sample language use and classroom interaction forms, and student questionnaire. A second appendix presents comments on the field guide. (MNS)