The classroom is devided into four groups, each with a failitator adult who can be from the local society without any prior knowledge about the subject.
Each group gets an assignemt to resolve under 15 minutes, when done they move to next assignment an so on until all groups have done all assignments.
The role of the facilitator is merely to facilitate students participation on equal basis and encourage all to contribute.
The teacher is there to support all the tables when needed.