This 3 sentence summary provides the essential information from the document: The document appears to be from a student notebook recording a class period at the Instituto Politécnico Nacional's CECyT No. 11 "Wilfrido Massieu". It identifies the student as Martínez Osnaya Jazmín, the teacher as Hernández Henández Gonzalo, and the class as 5IV18 for the period labeled "PERIOD 2".